CVE-2021-21683: jenkins project jenkins Path Traversal

Vulnerability summary

CVE-2021-21683 is a medium (CVSS 6.5) Path Traversal vulnerability in jenkins project jenkins. EPSS estimates a 2.17% chance of exploitation in the next 30 days, higher than 82.1% of scored vulnerabilities.

Timeline

1. 06-10-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

The file browser in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier 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.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.