Tutorial
5 min read
How to Find Exposed Jenkins CI/CD Servers
Discover misconfigured Jenkins instances that may allow unauthorized access to CI/CD pipelines.
1
Search for Jenkins servers
Jenkins commonly runs on port 8080. Many instances are left publicly accessible.
2
Find unauthenticated instances
Look for Jenkins servers responding with 200 OK — likely no authentication required.
lightbulb
Jenkins with no auth can allow script console access (RCE).
3
Check for HTTPS Jenkins
Some Jenkins instances run on HTTPS.
4
Find vulnerable versions
Search for Jenkins with known CVEs.
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Jenkins CVE-2024-23897 (file read) was widely exploited.
shield Remediation & Hardening
- check_circle Enable authentication — never run Jenkins with anonymous read/build access
- check_circle Use HTTPS with valid TLS certificates
- check_circle Place Jenkins behind a VPN or reverse proxy
- check_circle Disable Jenkins CLI if not needed
- check_circle Keep Jenkins and all plugins updated
- check_circle Restrict script console access to admins only
Try It Now
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