CVE-2021-21618 json
Stored XSS vulnerability in Jenkins Repository Connector Plugin
published 2021-02-24 5 y ago modified 2026-06-17 4 mo ago also GHSA-hg2w-3c4j-jjwm , EUVD-2022-4137
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 79.5%
- EPSS 79.5% chance of exploitation in 30 days, percentile 99.6%
- public exploits
- 0
- none known
Summary
Jenkins Repository Connector Plugin 2.0.2 and earlier does not escape parameter names and descriptions for past builds, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.
Patch / fix
- maven org.jenkins-ci.plugins:repository-connector 2.0.3
Exploit prediction
79.48% chance of exploitation in the next 30 days, higher than 99.6% 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:repository-connector | <2.0.3 |
2.0.3 |
Affected products
- Jenkins project Jenkins Repository Connector Plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
jenkins.io
/security/advisory/2021-02-24/#SECURITY-2183
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21618
advisory
-
github.com
/jenkinsci/repository-connector-plugin
package
Sources
- CVE List CVE-2021-21618
- GitHub Advisory GHSA-hg2w-3c4j-jjwm
- NVD CVE-2021-21618
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