What’s Vulnerable › Vulnerabilities

CVE-2021-21609

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-13 · updated 2026-06-17
• Weakness: CWE-863

Description

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not correctly match requested URLs to the list of always accessible paths, allowing attackers without Overall/Read permission to access some URLs as if they did have Overall/Read permission.

Affected products

• Jenkins: through 2.263.1; through 2.274

References

• https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2047
• https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2047

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