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MEDIUM severity

CVE-2021-21613 — tics

MEDIUMFix: jenkinsci/tics-plugin@a64493c

CVE-2021-21613 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in io.jenkins.plugins:tics. A fix is available for io.jenkins.plugins:tics — see the affected versions and patch details below.

XSS vulnerability in Jenkins TICS Plugin

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk+0.01%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.00%0.49%0.97%1.46%0.2%1.0%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕io.jenkins.plugins:tics

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Jenkins TICS Plugin 2020.3.0.6 and earlier does not escape TICS service responses.

This results in a cross-site scripting (XSS) vulnerability exploitable by attackers able to control TICS service response content.

Jenkins TICS Plugin 2020.3.0.7 escapes TICS service responses, or strips HTML out, as appropriate.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenio.jenkins.plugins:ticsall versions2020.3.0.7io.jenkins.plugins:tics:2020.3.0.7

Affected Products

1 product · 1 configurations
Application
ticsjenkins
≤ 2020.3.0.6
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.jenkins.plugins:tics, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update io.jenkins.plugins:tics to 2020.3.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21613 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

Jenkins TICS Plugin 2020.3.0.6 and earlier does not escape TICS service responses. This results in a cross-site scripting (XSS) vulnerability exploitable by attackers able to control TICS service response content. Jenkins TICS Plugin 2020.3.0.7 escapes TICS service responses, or strips HTML out, as appropriate.
O3 Security · Impact-Aware SCA

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CVE-2021-21613: tics XSS — Fixed in 2020.3.0.7