High · published October 29, 2025
🚨 A missing replay cache in the Jenkins SAML Plugin could let attackers impersonate users with ease! 🔥 Think of it like a restaurant where once you've ordered a dish, anyone else can just shout out your order and get served the same meal without any verification. That's how replay attacks work here, as the plugin doesn’t check whether a request is old or new! An attacker could capture SAML authentication requests and simply replay them, gaining unauthorized access to Jenkins as the victim user. This vulnerability is especially dangerous in environments where Jenkins manages critical CI/CD pipelines, potentially allowing for devastating disruptions in your deployment processes! ⚡
Think of it like a restaurant where once you've ordered a dish, anyone else can just shout out your order and get served the same meal without any verification. That's how replay attacks work here, as the plugin doesn’t check whether a request is old or new! The Jenkins SAML Plugin versions 4.583.vc68232f7018a_ and earlier lack a replay cache, meaning they don’t prevent previously captured authentication requests from being used again, leading to unauthorized access.
An attacker could capture SAML authentication requests and simply replay them, gaining unauthorized access to Jenkins as the victim user. This vulnerability is especially dangerous in environments where Jenkins manages critical CI/CD pipelines, potentially allowing for devastating disruptions in your deployment processes! ⚡ Update your Jenkins SAML Plugin to version 4.584 or later to implement the necessary replay cache. Additionally, consider reviewing your SAML configurations and user access policies to further mitigate any potential risks. 🛡️ You've got this! Follow these steps to protect your Jenkins environment and secure your CI/CD workflows! 💪✨
| Product | Versions | Fixed in |
|---|---|---|
| jenkins/saml | < 4.583.585.v22ccc1139f55 | 4.583.585.v22ccc1139f55 |