CVE-2021-21616
MediumStored XSS vulnerability in Jenkins Active Choices Plugin
Published May 24, 2022 · Updated Jul 9, 2026 · Also known as GHSA-4f6x-g5vh-8jm5
Key Facts
Patch immediately- CVE-2021-21616 is a medium-severity vulnerability (CVSS 4.6 v3.1) affecting Active Choices (Jenkins), org.biouno:uno-choice (maven), Jenkins Active Choices Plugin.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 76% probability of exploitation in the next 30 days.
- Fixed versions are available, including Active Choices <=2.5.2, org.biouno:uno-choice 2.5.3, Active Choices 2.5.2.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
4.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
76%
Higher than 99.5% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Active ChoicesJenkins | See advisory | 2.5.2 |
| org.biouno:uno-choicemaven | See advisory | 2.5.3 |
| Jenkins Active Choices Plugin | >= unspecified | n/a |
Patched Releases
Active Choices
<=2.5.2
org.biouno:uno-choice
2.5.3
Timeline
Publicly disclosed
May 24, 2022
Last updated
Jul 9, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2021-21616
- articlehttps://github.com/jenkinsci/active-choices-plugin/commit/d0b768c18bafd812b52fe579def8b14e26033ec9
- articlehttps://www.jenkins.io/security/advisory/2021-02-24/#SECURITY-2192
- article[oss-security] 20210224 Multiple vulnerabilities in Jenkins plugins
FAQ
Common Questions.
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.
Affected: Active Choices (Jenkins); org.biouno:uno-choice (maven); Jenkins Active Choices Plugin versions >= unspecified. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Active Choices <=2.5.2, org.biouno:uno-choice 2.5.3, Active Choices 2.5.2.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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