CVE-2021-21619
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…
Does this matter?
Lower severity and a low EPSS score (9.39%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 9.39% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- jenkins/claim
- Source
- jenkinsci-cert@googlegroups.com
EPSS 9.4% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2021/02/24/3Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20%281%29Vendor Advisory
- http://www.openwall.com/lists/oss-security/2021/02/24/3Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20%281%29Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.