CVE-2021-21683: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

October 6, 2021 (updated November 22, 2023)

The file browser in Jenkins may interpret some paths to files as absolute on Windows, resulting in a path traversal vulnerability allowing attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) to obtain the contents of arbitrary files.

References

www.openwall.com/lists/oss-security/2021/10/06/1
nvd.nist.gov/vuln/detail/CVE-2021-21683
www.jenkins.io/security/advisory/2021-10-06/

Code Behaviors & Features

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