CVE-2021-21666
Cross-site scripting in Jenkins Kiuwan Plugin
6.1
MEDIUM
CVSS 3.1
EPSS 0.17%
Description
Jenkins Kiuwan Plugin 1.6.0 and earlier does not escape query parameters in an error message for a form validation endpoint, resulting in a reflected cross-site scripting (XSS) vulnerability. Only older releases of Jenkins are affected by this vulnerability. Jenkins 2.275 and newer, LTS 2.263.2 and newer include a protection preventing this from being exploitable. Jenkins Kiuwan Plugin 1.6.1 escapes affected parts of the error message in the form validation endpoint.
How to fix CVE-2021-21666
To remediate CVE-2021-21666, upgrade the affected package to a fixed version below.
- —upgrade to 1.6.1 or later
Is CVE-2021-21666 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.6.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |