CVE-2021-21686
Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
9.0
CRITICAL
CVSS 3.1
EPSS 1.9%
Description
File path filters in the agent-to-controller security subsystem of Jenkins LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.
How to fix CVE-2021-21686
To remediate CVE-2021-21686, upgrade the affected package to a fixed version below.
- —upgrade to 2.319.0 or later
- —upgrade to 2.303.3 or later
Is CVE-2021-21686 being exploited?
Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.319.0
- from 0, < 2.303.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |