What’s Vulnerable › Vulnerabilities

CVE-2021-21697

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-04 · updated 2026-06-17

Description

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier allows any agent to read and write the contents of any build directory stored in Jenkins with very few restrictions.

Affected products

• Jenkins: through 2.303.2; through 2.318

References

• http://www.openwall.com/lists/oss-security/2021/11/04/3
• https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2428
• http://www.openwall.com/lists/oss-security/2021/11/04/3
• https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2428

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