Cyberdudebivash

  Executive summary Jenkins — the world’s most popular CI/CD automation server — has once again become a top-tier target. Critical vulnerabilities disclosed in September 2025 show that unpatched Jenkins instances can be fully compromised remotely , leading to supply-chain attacks, credential theft, and code manipulation . With over 144,000 Jenkins servers exposed globally (Shodan data, 2025), this is not just another patch cycle — it’s a clear and present danger . 1. What happened — the critical flaws Recent advisories highlight multiple bugs, including: RCE via unsafe deserialization : attackers can craft malicious payloads to gain code execution. Cross-Site Scripting (XSS) in the Jenkins UI, enabling session hijack and CSRF chaining. Privilege escalation : improper access control in plugins allows low-privileged accounts to escalate. Secrets disclosure : build logs and credential store exposure through flawed permission checks. Together, these flaws give att...