What’s Vulnerable › Vulnerabilities

CVE-2021-21623

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-18 · updated 2026-06-17
• Weakness: CWE-863

Description

An incorrect permission check in Jenkins Matrix Authorization Strategy Plugin 2.6.5 and earlier allows attackers with Item/Read permission on nested items to access them, even if they lack Item/Read permission for parent folders.

Affected products

• Jenkins project Jenkins Matrix Authorization Strategy Plugin: through 2.6.5

References

• http://www.openwall.com/lists/oss-security/2021/03/18/5
• https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-2180
• http://www.openwall.com/lists/oss-security/2021/03/18/5
• https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-2180

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