CVE-2021-21630
Jenkins Extra Columns Plugin 1.22 and earlier does not escape parameter values in the build parameters column, 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 72.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
Jenkins Extra Columns Plugin 1.22 and earlier does not escape parameter values in the build parameters column, 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
- 72.39% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- jenkins/extra columns
- Source
- jenkinsci-cert@googlegroups.com
EPSS 72.4% since 3 November 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/2021/03/30/1Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-03-30/#SECURITY-2222Vendor Advisory
- http://www.openwall.com/lists/oss-security/2021/03/30/1Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-03-30/#SECURITY-2222Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.