What’s Vulnerable › Vulnerabilities

CVE-2021-21695

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-04 · updated 2026-06-17
• Weakness: CWE-59

Description

FilePath#listFiles lists files outside directories that agents are allowed to access when following symbolic links in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Affected products

• Jenkins: before 2.303.3; before 2.319 — fixed in 2.303.3, 2.319

How to fix

Upgrade to a fixed version: Jenkins 2.303.3, 2.319. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/11/04/3
• https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455
• http://www.openwall.com/lists/oss-security/2021/11/04/3
• https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455

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