CVE-2021-21630

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 72.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-30 · updated 2026-06-17
Weakness: CWE-79

Description

Jenkins Extra Columns Plugin 1.22 and earlier does not escape parameter values in the build parameters column, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Affected products

Jenkins project Jenkins Extra Columns Plugin: through 1.22

References

http://www.openwall.com/lists/oss-security/2021/03/30/1
https://www.jenkins.io/security/advisory/2021-03-30/#SECURITY-2222
http://www.openwall.com/lists/oss-security/2021/03/30/1
https://www.jenkins.io/security/advisory/2021-03-30/#SECURITY-2222

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