What is CVE-2021-21613?

CVE-2021-21613 is a medium-severity vulnerability in Jenkins Tics, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-13.

How severe is CVE-2021-21613?

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

XSS in Jenkins Tics

CVE-2021-21613

Jenkins TICS Plugin 2020.3.0.6 and earlier does not escape TICS service responses, resulting in a cross-site scripting (XSS) vulnerability exploitable by attackers able to control TICS service response content.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-01-13 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.009 (59.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Jenkins Tics
Jenkins Project Tics Plugin — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.jenkins.io/security/advisory/2021-01-13/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21613?: CVE-2021-21613 is a medium-severity vulnerability in Jenkins Tics, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-13.
How severe is CVE-2021-21613?: Medium severity. CVSS v3 base score is 6.1 out of 10.