CVE-2021-21616
Jenkins Active Choices Plugin 2.5.2 and earlier does not escape reference parameter values, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 76.2%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
Jenkins Active Choices Plugin 2.5.2 and earlier does not escape reference parameter values, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.
- CVSS 3.1
- 4.6 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- EPSS
- 76.22% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- jenkins/active choices
- Source
- jenkinsci-cert@googlegroups.com
EPSS moved from 76.2% on 7 October 2026 to 76.2% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
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-2192Vendor 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-2192Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.