CVE-2021-21619

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-24 · updated 2026-06-17
Weakness: CWE-79

Description

Jenkins Claim Plugin 2.18.1 and earlier does not escape the user display name, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers who are able to control the display names of Jenkins users, either via the security realm, or directly inside Jenkins.

Affected products

Jenkins project Jenkins Claim Plugin: through 2.18.1

References

http://www.openwall.com/lists/oss-security/2021/02/24/3
https://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20%281%29
http://www.openwall.com/lists/oss-security/2021/02/24/3
https://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20%281%29

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