CVE-2021-21619 json
XSS vulnerability in Jenkins Claim Plugin
published 2021-02-24 5 y ago modified 2026-06-17 4 mo ago also GHSA-48hr-jg4p-w4p4 , EUVD-2022-2338
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 9.4%
- EPSS 9.4% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.jenkins-ci.plugins:claim 2.18.2
Exploit prediction
9.39% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.plugins:claim | <2.18.2 |
2.18.2 |
Affected products
- Jenkins project Jenkins Claim Plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
jenkins.io
/security/advisory/2021-02-24/#SECURITY-2188%20%281%29
vendor-advisory
-
openwall.com
/lists/oss-security/2021/02/24/3
mailing-list, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21619
advisory
-
github.com
/jenkinsci/claim-plugin
package
-
jenkins.io
/security/advisory/2021-02-24/#SECURITY-2188%20(1)
web
Sources
- CVE List CVE-2021-21619
- GitHub Advisory GHSA-48hr-jg4p-w4p4
- NVD CVE-2021-21619
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