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CVE-2021-21696

critical CVSS 9.8 EPSS 2.4%

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not limit agent read/write access to the libs/ directory inside build directories when using the FilePath APIs, allowing attackers in control of agent processes to replace the code of a trusted library with a modified variant. This results in unsandboxed code execution in the Jenkins controller process.

Versions it affects

Software versions checked with the free lookup that CVE-2021-21696 applies to, and the release that fixes it where the sources name one.

Jenkins 1.509

At a glance

Severity
Critical
CVSS base score
9.8 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
2.4% probability of exploitation in the next 30 days, higher than 83% of scored vulnerabilities
Published
2021-11-04
NVD CVE.org

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