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Good PoC

Issue type
PoC
Cross-site scripting
alert(document.domain) or setInterval`alert\x28document.domain\x29` if you have to use backticks. [1] Using document.domain instead of alert(1) can help avoid reporting XSS bugs in sandbox domains.
Command execution
Depends of program rules:
  • Read (Linux-based): cat /proc/1/maps
  • Write (Linux-based): touch /root/your_username
  • Execute (Linux-based): id
Code execution
This involves the manipulation of a web app such that server-side code (e.g. PHP) is executed.
  • PHP: <?php echo 7*7; ?>
SQL injection
Zero impact
  • MySQL and MSSQL: SELECT @@version
  • Oracle: SELECT version FROM v$instance;
  • Postgres SQL: SELECT version()
Unvalidated redirect
  • Set the redirect endpoint to a known safe domain (e.g. google.com), or if looking to demonstrate potential impact, to your own website with an example login screen resembling the target's.
  • If the target uses OAuth, you can try to leak the OAuth token to your server to maximise impact.
Information exposure
Investigate only with the IDs of your own test accounts — do not leverage the issue against other users' data — and describe your full reproduction process in the report.
Cross-site request forgery
When designing a real-world example, either hide the form (style="display:none;") and make it submit automatically, or design it so that it resembles a component from the target's page.
Server-side request forgery
The impact of a SSRF bug will vary — a non-exhaustive list of proof of concepts includes:
  • reading local files
  • obtaining cloud instance metadata
  • making requests to internal services (e.g. Redis)
  • accessing firewalled databases
Local file read
Make sure to only retrieve a harmless file. Check the program security policy as a specific file may be designated for testing.
XML external entity processing
Output random harmless data.
Sub-domain takeover
Claim the sub-domain discreetly and serve a harmless file on a hidden page. Do not serve content on the index page.

Good Report

# Writeups
# https://github.com/devanshbatham/Awesome-Bugbounty-Writeups
# Bug bounty Report
# Summary
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# Vulnerability details
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# Impact
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# Proof of concept
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# Browsers verified in
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# Mitigation
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