π₯ OGNL Injection β The Dangerous Java Vulnerability Hackers Love π
Most developers never think about OGNL Injectionβ¦
But attackers love it because it can lead to Remote Code Execution (RCE) π
Letβs understand this with a simple example π
ββββββββββββββββββββ
π§ What is OGNL Injection?
OGNL (Object-Graph Navigation Language) is used in Java frameworks to evaluate expressions.
If an application evaluates user input directly, attackers can execute commands on the server.
ββββββββββββββββββββ
β οΈ Simple Example
Normal request:
/login?name=admin
Testing payload:
/login?name=%{7*7}
If response shows:
49
π¨ The application is vulnerable to OGNL Injection
ββββββββββββββββββββ
π Dangerous Payload Example
%{
#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse']
.addHeader('X-Vulnerable','Yes')}
If header added β Confirmed vulnerability
ββββββββββββββββββββ
π₯ Real Impact
If vulnerable, attacker can:
β
Execute system commands
β
Upload web shell
β
Access sensitive data
β
Bypass authentication
β
Full server compromise
ββββββββββββββββββββ
π― Bug Bounty Testing Payloads
Try these payloads:
%{7*7}
${7*7}
%{
#a=1 1}
%{
#context}
%{
#_memberAccess}
Pro Tip π‘
Try injecting in:
- Headers
- Parameters
- File uploads
- Cookies
- JSON body
ββββββββββββββββββββ
π‘οΈ Defence / Prevention
Developers should:
β
Disable dynamic OGNL evaluation
β
Validate user input
β
Update framework to latest version
β
Use security filters
β
Apply WAF protection
β
Avoid evaluating user-controlled data
ββββββββββββββββββββ
π¨ Real World Example
One OGNL vulnerability caused one of the biggest data breaches in history.
Millions of users data leaked because of this single bug.
Never underestimate OGNL Injection.
ββββββββββββββββββββ
π¬ Are you testing for OGNL in your bug bounty targets?
Comment "YES" if you're already hunting this π
#CyberSecurity #BugBounty #EthicalHacking #Pentesting
#SecurityResearch #BugHunter #WebSecurity #Hacking
#Infosec #Vulnerability #RCE #JavaSecurity
#BugBountyTips #HackTraining #SecurityLearning