Web Application Security & Bug Bounty (Methodology, Reconnaissance, Vulnerabilities, Reporting)

18 min readJan 25, 2019

Hello Folks , Hope everyone is doing good. This blog is basically for Web Security Methodology (WSM).
Have you read my last post regarding “Bug Bounty Methodology” ? If you missed it go to this BBM link https://medium.com/@infosecsanyam/bug-bounty-hunting-methodology-toolkit-tips-tricks-blogs-ef6542301c65

Now this time i will share methodology for Web Application Security Assessment from beginning to end (Recon to Reporting/ R&R) . Try to cover most of the vulnerabilities links for web application security.

Methodology of Application Vulnerability Assessment & Pen-testing

Defining a Scope
Reconnaissance
Manual Assessment (Web Security Vulnerabilities)
Reports

Defining a Scope :

Each bug bounty or Web Security Project has a “scope”, or in other words, a section of a Scope of Project ,websites of bounty program’s details that will describe what type of security vulnerabilities a program is interested in receiving, where a researcher is allowed to test and what type of testing is permitted. On Bug-crowd, a bounty’s scope can be found in the “Program Details” bounty brief section of a program page. In your web application project has give the scope which websites , subdomains, api’s links for assessment.

Reconnaissance:

Therefore I will not be explaining how to test for vulnerabilities, but rather where to test for them & the tools you can use. This is mainly just a general overview of how someone would map out a target site and efficiently perform reconnaissance to gain as much info on the site as possible before beginning their audit.Recon is an essential element of any penetration testing.

For Finding Web Security Vulnerabilities are not very simple . When you’re taking part in a bug bounty program, you’re competing against both the security of the site, and also against the thousands of other people who are taking part in the program. For this reason, it’s important to think critically.

This is why passive and active reconnaissance is especially important for Scope, as you need to look a lot deeper than you would in a regular penetration test.

Sometimes I forgot to do That and Shit happens Submitting things that aren’t within scope of the bounty program, tells the people running the program that you haven’t properly read the terms, and it will lead to them not taking your future reports seriously. I mean Seriously

Start a Reconnaissance

Subdomain Finding :

1. https://pentest-tools.com/

2. https://virustotal.com/

3. https://www.shodan.io/

4. https://crt.sh/?q=%25taregt.com

5. https://dnsdumpster.com/

6. https://censys.io

7. http://dnsgoodies.com

Github Open Source tools for Subdomain Finding :-

After getting all sub-domains we found two methods to scan an ip’s, ports and Services:

1. Masscan can also help https://github.com/robertdavidgraham/masscan

2. Aquatone : https://github.com/michenriksen/aquatone

3. Nmap

Also Just don’t get limited to Subdomains Try extracting vhosts 🙂 tools like

Also Don’t forget your best friend Google :p Use google Dorks U can make your own or use make by others 😉

Try it out

Google Dorks :

site:target.com -www
site:target.com intitle:”test” -support
site:target.com ext:php | ext:html
site:subdomain.target.com
site:target.com inurl:auth
site:target.com inurl:dev

Information Gathering Part

1. Whois Information

2. Subdomains

3. Dir info

4. S3 Buckets

5. social accounts

6. API Endpoints

7. emails

8. Vhosts

9. Backend IP address

10. Open Ports / Services running

11. Service version info (if applicable)

12. server banners

13. directory listings

14. presence security headers

Make sure to spend as much time as possible performing recon, until you have a pretty good feel of how the site operates,

There are even occasions where passive recon can lead to some important information Disclosure. i.e. searching github or pastebin for the company name and stumbling across some random source that ended up online after some sloppy developer wrote it.

For that I would prefer

Don’t forget to look deep into Js files well manually you will love it But time saving is the goal so try using tools like

1 https://github.com/jobertabma/relative-url-extractor

To look for older content that can give u ideas of site structure or maybe vulnerable endpoints 😉 For that use

Maybe reverse whois lookup will help to discover more potential targets but make sure that they are in scope

1. http://viewdns.info/reversewhois/?q=

Alright, so then there’s this thing called PunkSpider. (https://www.punkspider.org) “It is a global web application vulnerability search engine. Don’t get too excited though.
Web Application Vulnerabilities & Bug Bounty Reference

A list of bug bounty / web app security write-up that is categorized by the bug nature,

1 Sql Injection :

SQL injection is a kind of injection vulnerability in which the attacker tries to inject arbitrary pieces of malicious data(Code) into the input fields of an application, which, when processed by the application, causes that data to be executed as a piece of code by the back end SQL server, thereby giving undesired results which the developer of the application did not anticipate.

List of Database

MySQL(Open source),
MSSQL,
MS-ACCESS,
Oracle,
Postgre SQL(open source),
SQLite,

Type of SQL Injection

In Band
Out of Band
Blind SQLI

SQLI Exploitation Technique

Error Based Exploitation
Union Based Exploitation
Boolean Based Exploitation
Time Based Delay Exploitation
Out of Band Exploitation

Try to Identify- where the application interact with DB

Authentication Page
Search Fields
Post Fields
Get Fields
HTTP Header
Cookie

Based on the response received from the server

Error-based SQL injections

Union Query Type
Double Query Injection

Blind SQL Injections

Boolean-based blind injections.
Time based blind injections

Sql Injection Practice Lab

1. http://leettime.net/sqlninja.com/

2. http://hack.me/

3. http://www.sqlinjection.net/

4. https://sqlzoo.net/

5. https://github.com/Audi-1/sqli-labs

Tutorials

1. https://www.exploit-db.com/

2. https://www.hackingarticles.in/

3. http://securityidiots.com/

4. http://breakthesecurity.cysecurity.org/

5. http://lastc0de.blogspot.com/2013/07/tutorial-sql-injection-manual.html

SQL Injection Bug Bounty Writeups Written by ngalongc & @arushsinghania this is inspired by https://github.com/djadmin/awesome-bug-bounty:-

SQL injection in WordPress Plugin Huge IT Video Gallery in Uber by glc
SQL Injection on sctrack.email.uber.com.cn by Orange Tsai
Yahoo — Root Access SQL Injection — tw.yahoo.com by Brett Buerhaus
Multiple vulnerabilities in a WordPress plugin at drive.uber.com by Abood Nour (syndr0me)
GitHub Enterprise SQL Injection by Orange

Cross Site Scripting Tutorial & Pratical

1. https://excess-xss.com/

2. https://hackertarget.com/xss-tutorial/

3. https://xss-game.appspot.com/

4. http://leettime.net/xsslab1/chalg1.php

5. https://hack.me/t/XSS

6. https://xss-quiz.int21h.jp/

7. https://steve.fi/Security/XSS/Tutorial/

8. https://www.hacking-tutorial.com/hacking-tutorial/xss-attack-hacking-using-beef-xss-framework/#sthash.pIAyu7PF.dpbs

Cross-Site Scripting (XSS) Bug Bounty

Sleeping stored Google XSS Awakens a $5000 Bounty by Patrik Fehrenbach
RPO that lead to information leakage in Google by filedescriptor
God-like XSS, Log-in, Log-out, Log-in in Uber by Jack Whitton
Three Stored XSS in Facebook by Nirgoldshlager
Using a Braun Shaver to Bypass XSS Audit and WAF by Frans Rosen
An XSS on Facebook via PNGs & Wonky Content Types by Jack Whitton
he is able to make stored XSS from a irrelevant domain to main facebook domain
Stored XSS in *.ebay.com by Jack Whitton
Complicated, Best Report of Google XSS by Ramzes
Tricky Html Injection and Possible XSS in sms-be-vip.twitter.com by secgeek
Command Injection in Google Console by Venkat S
Facebook’s Moves — OAuth XSS by PAULOS YIBELO
Stored XSS in Google Docs (Bug Bounty) by Harry M Gertos
Stored XSS on developer.uber.com via admin account compromise in Uberby James Kettle (albinowax)
Yahoo Mail stored XSS by Klikki Oy
Abusing XSS Filter: One ^ leads to XSS(CVE-2016–3212) by Masato Kinugawa
Youtube XSS by fransrosen
Best Google XSS again — by Krzysztof Kotowicz
IE & Edge URL parsin Problem — by detectify
Google XSS subdomain Clickjacking
Microsoft XSS and Twitter XSS
Google Japan Book XSS
Flash XSS mega nz — by frans
Flash XSS in multiple libraries — by Olivier Beg
xss in google IE, Host Header Reflection
Years ago Google xss
xss in google by IE weird behavior
xss in Yahoo Fantasy Sport
xss in Yahoo Mail Again, worth $10000 by Klikki Oy
Sleeping XSS in Google by securityguard
Decoding a .htpasswd to earn a payload of money by securityguard
Google Account Takeover
AirBnb Bug Bounty: Turning Self-XSS into Good-XSS #2 by geekboy
Uber Self XSS to Global XSS
How I found a $5,000 Google Maps XSS (by fiddling with Protobuf) by Marin MoulinierFollow
Airbnb — When Bypassing JSON Encoding, XSS Filter, WAF, CSP, and Auditor turns into Eight Vulnerabilities by Brett
XSSI, Client Side Brute Force
postMessage XSS Bypass
XSS in Uber via Cookie by zhchbin
Stealing contact form data on www.hackerone.com using Marketo Forms XSS with postMessage frame-jumping and jQuery-JSONP by frans
XSS due to improper regex in third party js Uber 7k XSS
XSS in TinyMCE 2.4.0 by Jelmer de Hen
Pass uncoded URL in IE11 to cause XSS
Twitter XSS by stopping redirection and javascript scheme by Sergey Bobrov

Brute Force

Web Authentication Endpoint Credentials Brute-Force Vulnerability by Arne Swinnen
InstaBrute: Two Ways to Brute-force Instagram Account Credentials by Arne Swinnen
How I Could Compromise 4% (Locked) Instagram Accounts by Arne Swinnen
Possibility to brute force invite codes in riders.uber.com by r0t
Brute-Forcing invite codes in partners.uber.com by Efkan Gökbaş (mefkan)
How I could have hacked all Facebook accounts by Anand Prakash
Facebook Account Take Over by using SMS verification code, not accessible by now, may get update from author later by Arun Sureshkumar

Stealing Access Token

Facebook Access Token Stolen by Jack Whitton –
Obtaining Login Tokens for an Outlook, Office or Azure Account by Jack Whitton
Bypassing Digits web authentication’s host validation with HPP by filedescriptor
Bypass of redirect_uri validation with /../ in GitHub by Egor Homakov
Bypassing callback_url validation on Digits by filedescriptor
Stealing livechat token and using it to chat as the user — user information disclosure by Mahmoud G. (zombiehelp54)
Change any Uber user’s password through /rt/users/passwordless-signup — Account Takeover (critical) by mongo (mongo)
Internet Explorer has a URL problem, on GitHub by filedescriptor.
How I made LastPass give me all your passwords by labsdetectify
Steal Google Oauth in Microsoft
Steal FB Access Token
Paypal Access Token Leaked
Steal FB Access Token
Appengine Cool Bug
Slack post message real life experience
Bypass redirect_uri by nbsriharsha
Stealing Facebook Messenger nonce worth 15k

Google oauth bypass

Bypassing Google Authentication on Periscope’s Administration Panel By Jack Whitton

CSRF

Messenger.com CSRF that show you the steps when you check for CSRF by Jack Whitton
Paypal bug bounty: Updating the Paypal.me profile picture without consent (CSRF attack) by Florian Courtial
Hacking PayPal Accounts with one click (Patched) by Yasser Ali
Add tweet to collection CSRF by vijay kumar
Facebookmarketingdevelopers.com: Proxies, CSRF Quandry and API Funby phwd
How i Hacked your Beats account ? Apple Bug Bounty by @aaditya_purani

Remote Code Execution

JDWP Remote Code Execution in PayPal by Milan A Solanki
XXE in OpenID: one bug to rule them all, or how I found a Remote Code Execution flaw affecting Facebook’s servers by Reginaldo Silva
How I Hacked Facebook, and Found Someone’s Backdoor Script by Orange Tsai
How I Chained 4 vulnerabilities on GitHub Enterprise, From SSRF Execution Chain to RCE! by Orange Tsai
uber.com may RCE by Flask Jinja2 Template Injection by Orange Tsai
Yahoo Bug Bounty — *.login.yahoo.com Remote Code Execution by Orange Tsai (Sorry its in Chinese Only)
How we broke PHP, hacked Pornhub and earned $20,000 by Ruslan Habalov
Alert, God-like Write-up, make sure you know what is ROP before clicking, which I don’t =(
RCE deal to tricky file upload by secgeek
WordPress SOME bug in plupload.flash.swf leading to RCE in Automaticby Cure53 (cure53)
Read-Only user can execute arbitraty shell commands on AirOS by 93c08539 (93c08539)
Remote Code Execution by impage upload! by Raz0r (ru_raz0r)
Popping a shell on the Oculus developer portal by Bitquark
Crazy! PornHub RCE AGAIN!!! How I hacked Pornhub for fun and profit — 10,000$ by 5haked
PayPal Node.js code injection (RCE) by Michael Stepankin
eBay PHP Parameter Injection lead to RCE
Yahoo Acqusition RCE
Command Injection Vulnerability in Hostinger by @alberto__segura
RCE in Airbnb by Ruby Injection by buerRCE
RCE in Imgur by Command Line
RCE in git.imgur.com by abusing out dated software by Orange Tsai
RCE in Disclosure
Remote Code Execution by struct2 Yahoo Server
Command Injection in Yahoo Acquisition
Paypal RCE
$50k RCE in JetBrains IDE
$20k RCE in Jenkin Instance by @nahamsec

Deserialization

Java Deserialization in manager.paypal.com by Michael Stepankin
Instagram’s Million Dollar Bug by Wesley Wineberg
(Ruby Cookie Deserialization RCE on facebooksearch.algolia.com by Michiel Prins (michiel)
Java deserialization by meals

Image Tragick

Exploiting ImageMagick to get RCE on Polyvore (Yahoo Acquisition) by NaHamSec
Exploting ImageMagick to get RCE on HackerOne by c666a323be94d57
Trello bug bounty: Access server’s files using ImageTragick by Florian Courtial
40k fb rce
Yahoo Bleed 1
Yahoo Bleed 2

Insecure Direct Object Reference (IDOR)

Trello bug bounty: The websocket receives data when a public company creates a team visible board by Florian Courtial
Trello bug bounty: Payments informations are sent to the webhook when a team changes its visibility by Florian Courtial
Change any user’s password in Uber by mongo
Vulnerability in Youtube allowed moving comments from any video to another by secgeek
It’s Google Vulnerability, so it’s worth reading, as generally it is more difficult to find Google vulnerability
Twitter Vulnerability Could Credit Cards from Any Twitter Account by secgeek
One Vulnerability allowed deleting comments of any user in all Yahoo sitesby secgeek
Microsoft-careers.com Remote Password Reset by Yaaser Ali
How I could change your eBay password by Yaaser Ali
Duo Security Researchers Uncover Bypass of PayPal’s Two-Factor Authentication by Duo Labs
Hacking Facebook.com/thanks Posting on behalf of your friends! by Anand Prakash
How I got access to millions of [redacted] accounts
All Vimeo Private videos disclosure via Authorization Bypass with Excellent Technical Description by Enguerran Gillier (opnsec)
Urgent: attacker can access every data source on Bime by Jobert Abma (jobert)
Downloading password protected / restricted videos on Vimeo by Gazza (gazza)
Get organization info base on uuid in Uber by Severus (severus)
How I Exposed your Primary Facebook Email Address (Bug worth $4500)by Roy Castillo
DOB disclosed using “Facebook Graph API Reverse Engineering” by Raja Sekar Durairaj
Change the description of a video without publish_actions permission in Facebook by phwd
Response To Request Injection (RTRI) by ?, be honest, thanks to this article, I have found quite a few bugs because of using his method, respect to the author!
Leak of all project names and all user names , even across applications on Harvest by Edgar Boda-Majer (eboda)
Changing paymentProfileUuid when booking a trip allows free rides at Uber by Matthew Temmy (temmyscript)
View private tweet
Uber Enum UUID
Hacking Facebook’s Legacy API, Part 1: Making Calls on Behalf of Any Userby Stephen Sclafani
Hacking Facebook’s Legacy API, Part 2: Stealing User Sessions by Stephen Sclafani
Delete FB Video
Delete FB Video
Facebook Page Takeover by Manipulating the Parameter by arunsureshkumar
Viewing private Airbnb Messages
IDOR tweet as any user by kedrisec
Classic IDOR endpoints in Twitter
Mass Assignment, Response to Request Injection, Admin Escalation by sean

XXE (XML External Entity)

How we got read access on Google’s production servers by detectify
Blind OOB XXE At UBER 26+ Domains Hacked by Raghav Bisht
XXE through SAML
XXE in Uber to read local files
XXE by SVG in community.lithium.com

Unrestricted File Upload

File Upload XSS in image uploading of App in mopub by vijay kumar
RCE deal to tricky file upload by secgeek
File Upload XSS in image uploading of App in mopub in Twitter by vijay kumar (vijay_kumar1110)

Server Side Request Forgery (SSRF)

Race Condition

Race conditions on Facebook, DigitalOcean and others (fixed) by Josip Franjković
Race Conditions in Popular reports feature in HackerOne by Fábio Pires (shmoo)

Business Logic Flaw

Facebook simple technical hack to see the timeline by Ashish Padelkar
How I Could Steal Money from Instagram, Google and Microsoft by Arne Swinnen
How I could have removed all your Facebook notes
Facebook — bypass ads account’s roles vulnerability 2015 by POUYA DARABI
Uber Ride for Free by anand praka
Uber Eat for Free by

Authentication Bypass

OneLogin authentication bypass on WordPress sites via XMLRPC in Uberby Jouko Pynnönen (jouko)
2FA PayPal Bypass by henryhoggard
SAML Bug in Github worth 15000
Authentication bypass on Airbnb via OAuth tokens theft
Uber Login CSRF + Open Redirect -> Account Takeover at Uber
[http://c0rni3sm.blogspot.hk/2017/08/accidentally-typo-to-bypass.html?m=1](Administrative Panel Access) by c0rni3sm
Uber Bug Bounty: Gaining Access To An Internal Chat System by mishre

HTTP Header Injection

Twitter Overflow Trilogy in Twitter by filedescriptor
Twitter CRLF by filedescriptor
Adblock Plus and (a little) more in Google
$10k host header by Ezequiel Pereira

Subdomain Takeover

Hijacking tons of Instapage expired users Domains & Subdomains by geekboy
Reading Emails in Uber Subdomains
Slack Bug Journey — by David Vieira-Kurz
Subdomain takeover and chain it to perform authentication bypass by Arne Swinnen

Author Write Up

XSSI

Email Related

Money Stealing

Round error issue -> produce money for free in Bitcoin Site by 4lemon

Local File Inclusion

CSV Injection :

1. https://hackerone.com/reports/386116

2. https://hackerone.com/reports/72785

3. https://hackerone.com/reports/223344

4. https://hackerone.com/reports/244292

5. https://payatu.com/csv-injection-basic-to-exploit/

6. https://www.owasp.org/index.php/CSV_Injection

7. https://www.we45.com/blog/2017/02/14/csv-injection-theres-devil-in-the-detail

CRLF: (Carriage Return line feed)

1. https://www.netsparker.com/blog/web-security/crlf-http-header/

2. https://hackerone.com/reports/217058

3. https://hackerone.com/reports/66391

4. https://hackerone.com/reports/237357

5. https://www.acunetix.com/websitesecurity/crlf-injection/

6. https://www.owasp.org/index.php/CRLF_Injection

Host header injection :

1. https://www.linkedin.com/pulse/host-header-injection-depth-utkarsh-tiwari

2. https://hackerone.com/reports/94637

3. https://medium.com/@rockerramg94/host-header-injection-attack-6cf4ffeb5a03

4. https://dzone.com/articles/what-is-a-host-header-attack

5. https://www.acunetix.com/vulnerabilities/web/host-header-attack/

6. https://hackerone.com/reports/235281

Cache poisoning

1. https://blog.stackpath.com/glossary/cache-poisoning/

2. https://portswigger.net/blog/practical-web-cache-poisoning

3. https://hackerone.com/reports/487

4. https://www.hackerone.com/zerodaily/2018-08-10

HTTP Response Splitting

1. https://www.owasp.org/index.php/HTTP_Response_Splitting

2.http://projects.webappsec.org/w/page/13246931/HTTP%20Response%20Splitting

3. https://hackerone.com/reports/171473

4. https://hackerone.com/reports/52042

5. https://hackerone.com/reports/53843

Web parameter tampering :

1. https://www.owasp.org/index.php/Web_Parameter_Tampering

2. https://hackerone.com/reports/141090

3. https://hackerone.com/reports/218748

Express Lang injection:

1. https://portswigger.net/kb/issues/00100f20_expression-language-injection

2. http://danamodio.com/appsec/research/spring-remote-code-with-expression-language-injection/

3. https://www.owasp.org/index.php/Expression_Language_Injection

4. https://www.scribd.com/document/212883640/Expression-Language-Injection

HTML Injection

1. https://www.acunetix.com/vulnerabilities/web/html-injection/

2. https://www.owasp.org/index.php/Testing_for_HTML_Injection_(OTG-CLIENT-003)

3. https://admin.utep.edu/Default.aspx?tabid=54090

4. https://hackerone.com/reports/328210

5. https://hackerone.com/reports/324548

6. https://hackerone.com/reports/383117

Blind XPATH Injection:-

1. https://www.owasp.org/index.php/Blind_XPath_Injection

2. https://www.scip.ch/en/?labs.20180802

3. https://www.paladion.net/blogs/xpath-injection-in-xml-databases

4. http://www.hackeone.info/2017/11/xpath-injection-tutorial-to-hack.html

LDAP Injection:-

1. http://projects.webappsec.org/w/page/13246947/LDAP%20Injection

2. https://www.owasp.org/index.php/LDAP_injection

3. https://portswigger.net/kb/issues/00100500_ldap-injection

4. https://www.synopsys.com/software-integrity/resources/knowledge-database/ldap-injection.html

OS Command Injection

1. https://www.owasp.org/index.php/Command_Injection

2.https://www.owasp.org/index.php/Testing_for_Command_Injection_(OTG-INPVAL-013)

3. https://www.checkmarx.com/knowledge/knowledgebase/OS-Command_Injection

4. https://www.hackingarticles.in/beginner-guide-os-command-injection/

5. https://hackerone.com/reports/303061

6. https://hackerone.com/reports/331032

7. https://hackerone.com/reports/340208

8. https://hackerone.com/reports/390865

9. https://hackerone.com/reports/388936

10. https://medium.com/bugbountywriteup/command-injection-poc-72cc3743f10d

SOP Bypass

1. https://resources.infosecinstitute.com/bypassing-same-origin-policy-sop/#gref

2. https://www.hackinglab.com/misc/downloads/event_2010/simon_egli_same_origin_policy_v1.0.pdf

3. https://hackerone.com/reports/164916

4. https://hackerone.com/reports/399427

5. https://hackerone.com/reports/235200

UI redressing attack & Clickjacking :

1. https://www.owasp.org/index.php/Clickjacking

2. https://www.imperva.com/Resources/Glossary/clickjacking-ui-redressing

3. https://www.geeksforgeeks.org/clickjacking-ui-redressing/

4. https://www.thesecuritybuddy.com/vulnerabilities/what-is-clickjacking-or-ui-redress-attack/

5. https://nakedsecurity.sophos.com/2008/10/09/ui-redress-attacks-aka-clickjacking/

6. https://hackerone.com/reports/85624

7. https://hackerone.com/reports/299009

8. https://medium.com/@raushanraj_65039/google-clickjacking-6a04132b918a

9. http://jasminderpalsingh.info/single.php?p=87

10. http://blog.securelayer7.net/clickjacking-vulnerability-google-cloud-print/

Session Fixation :

1. https://www.owasp.org/index.php/Session_fixation

2. https://www.owasp.org/index.php/Testing_for_Session_Fixation_(OTG-SESS-003)

3. http://projects.webappsec.org/w/page/13246960/Session%20Fixation

4. https://medium.com/white-hats/introduction-to-session-fixing-75409ffeaa5

5. https://medium.com/@grep_security/session-fixation-broken-authentication-and-session-management-c37ce0111bf5

6. https://hackerone.com/reports/135797

7. https://hackerone.com/reports/18501

8. https://hackerone.com/reports/167698

Missing http only

1. https://www.owasp.org/index.php/HttpOnly

2. https://hackerone.com/reports/239380

3. https://hackerone.com/reports/75357

4. https://resources.infosecinstitute.com/securing-cookies-httponly-secure-flags/#gref

Error Message Reveals sensitive Information/ Visible Detailed Error/Debug Page

1. https://hackerone.com/reports/304708

2. https://hackerone.com/reports/294464

3. https://hackerone.com/reports/20279

Token Leakage via Referrer

1. https://hackerone.com/reports/272379

2. https://hackerone.com/reports/342693

3. https://hackerone.com/reports/252544

4. https://hackerone.com/reports/265740

5. https://hackerone.com/reports/253448

User Enumeration:

1.https://www.owasp.org/index.php/Testing_for_User_Enumeration_and_Guessable_User_Account_(OWASP-AT-002)

2. https://blog.rapid7.com/2017/06/15/about-user-enumeration/

3. https://www.hacksplaining.com/prevention/user-enumeration

4. https://portswigger.net/blog/preventing-username-enumeration

5. https://hackerone.com/reports/282564

6. https://hackerone.com/reports/280509

7. https://hackerone.com/reports/250457

8. https://hackerone.com/reports/179701

9. https://hackerone.com/reports/223531

10. https://hackerone.com/reports/257035

11. https://hackerone.com/reports/335427

CSS Injection :

1. https://portswigger.net/kb/issues/00501300_css-injection-reflected

2. https://www.owasp.org/index.php/Testing_for_CSS_Injection_(OTG-CLIENT-005)

3. https://hackerone.com/reports/315865

4. https://hackerone.com/reports/386334

Miscellaneous

10 rules of Bug Bounty

Following “10 rules of Bug Bounty”

Targeting the Bug Bounty Program
How do you Approach the Target ?
Don’t Expect Anything !
Less Knowledge about Vulnerabilities and Testing Methodologies
Surround yourself with Bug Bounty Community to keep yourself Updated
AUTOMATION
GET BOUNTY or GET EXPERIENCE
FIND THE “BUG” or FIND A “BUG’S CHAIN”
FOLLOW MASTER’S PATH
RELAX & ENJOY LIFE

Writing Successful Bug & Vulnerability Submission Report

What does a good report look like?

Legend has it that the best bug bounty hunters can write reports in their sleep. OK, jokes aside, while writing reports is a very important part of bug bounty hunting, we can simplify this whole process by following these basic guidelines.

Summary

The first section of your report should start with a brief summary introducing the reader to your finding. Summaries can be as simple as:

example.com is vulnerable to reflected XSS via the q parameter.

Or as detailed as:

https://imgur.com/vidgif/url endpoint is vulnerable to a SSRF vulnerability which allows an attacker to craft connections originating from imgur servers to any destination on the internet and imgur internal network and craft outgoing UDP-packets / telnet-based protocol sessions (for example, to connect to SMTP servers from imgur and send spam). [1]

Vulnerability Description

This section covers all the details related to your finding. State what you found again, make the technical points clear, and explain what causes the issue. There are exceptions though where this section can be skipped. There is a popular English idiom:

“A picture is worth a thousand words.”

The same can be said about an excellent proof of concept:

“A phenomenal security vulnerability proof of concept is worth a thousand words.”
- Probably Gandhi

Proof of concept

The proof of concept is where you really need to demonstrate the impact in the “flashiest” way possible. Make it as easy as possible for the program to see what the issue is. If your issue is cross-site scripting, then an alert(document.domain) can go a long way to help the program figure out where the issue lies.

Browsers verified in

Even if the issue is not browser-dependent, it is good practice to inform the program about what browser you used to trigger the vulnerability. This can help the team behind the bug bounty program reproduce your finding.

Google Chrome: visit chrome://version/
Mozilla Firefox: top-right menu icon → ? “Help” → “About Firefox”
Microsoft Internet Explorer: top-right cog → “About Internet Explorer”
Microsoft Edge: … → “Settings” → scroll down

Mitigation

If you followed the advice in “How do I get started with bug bounty hunting?”, you should be capable of giving a brief description of how the bug bounty program should fix your finding. It is also a good idea to link to the relevant OWASP Prevention cheat sheet.

Report Writing Well that’s all Folks Hopefully my way of doing basic recon can help you to properly Select the target-Map it out properly-Hunt it down using the information you have gathered and At the end Writing a Report suggestion is to read the blog https://blog.bugcrowd.com/advice-for-writing-a-great-vulnerability-report/

Good Report Example :

1. https://hackerone.com/reports/73567

2. https://bugbountyguide.com/hunters/writing-reports.html

Some great resources for vulnerability report best practices are:

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