CVE-2021-39133

Cross-Site Request Forgery (CSRF) can run untrusted code on Rundeck server

Workarounds

Please visit https://rundeck.com/security for information about specific workarounds.

For more information

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A user with admin access to the system resource type is potentially vulnerable to a CSRF attack that could cause the server to run untrusted code on all Rundeck editions.

A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones. Typical impact: state-changing actions performed as the victim without their consent.

CVE-2021-39133 has a CVSS score of 7.2 (High). The vector is network-reachable, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.4.3, 3.3.14); upgrading removes the vulnerable code path.

Kodem intelligence

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Available in Rundeck 3.4.3 and 3.3.14

1. What is CVE-2021-39133? CVE-2021-39133 is a high-severity cross-site request forgery (CSRF) vulnerability in org.rundeck:rundeck-core (maven), affecting versions >= 3.4.0, < 3.4.3. It is fixed in 3.4.3, 3.3.14. A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones.
2. How severe is CVE-2021-39133? CVE-2021-39133 has a CVSS score of 7.2 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of org.rundeck:rundeck-core are affected by CVE-2021-39133? org.rundeck:rundeck-core (maven) versions >= 3.4.0, < 3.4.3 is affected.
4. Is there a fix for CVE-2021-39133? Yes. CVE-2021-39133 is fixed in 3.4.3, 3.3.14. Upgrade to this version or later.
5. Is CVE-2021-39133 exploitable, and should I be worried? Whether CVE-2021-39133 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2021-39133 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2021-39133?
   • Upgrade org.rundeck:rundeck-core to 3.4.3 or later
   • Upgrade org.rundeck:rundeck-core to 3.3.14 or later

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