CVE-2021-21699
Jenkins Active Choices Plugin 2.5.6 and earlier does not escape the parameter name of reactive parameters and dynamic reference parameters, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 88.5%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
Jenkins Active Choices Plugin 2.5.6 and earlier does not escape the parameter name of reactive parameters and dynamic reference parameters, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.
- 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
- 88.48% 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 88.5% 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/2021/11/12/1Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-11-12/#SECURITY-2219Vendor Advisory
- http://www.openwall.com/lists/oss-security/2021/11/12/1Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-11-12/#SECURITY-2219Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.