What is CVE-2021-21666?

CVE-2021-21666 is a medium-severity vulnerability in Jenkins Kiuwan, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-10.

How severe is CVE-2021-21666?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Jenkins Kiuwan

CVE-2021-21666

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.012 (66.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Jenkins Kiuwan
Jenkins Project Kiuwan Plugin — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jenkinsci-cert@googlegroups.com (x_refsource_CONFIRM, Vendor Advisory)
jenkinsci-cert@googlegroups.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21666?: CVE-2021-21666 is a medium-severity vulnerability in Jenkins Kiuwan, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-10.
How severe is CVE-2021-21666?: Medium severity. CVSS v3 base score is 6.1 out of 10.