What is CVE-2021-43288?

CVE-2021-43288 is a medium-severity vulnerability in Thoughtworks Gocd, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-04-14.

How severe is CVE-2021-43288?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Thoughtworks Gocd

CVE-2021-43288

An issue was discovered in ThoughtWorks GoCD before 21.3.0. An attacker in control of a GoCD Agent can plant malicious JavaScript into a failed Job Report.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.5% 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

Thoughtworks Gocd

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.gocd.org/releases/ (Release Notes, Issue Tracking, Vendor Advisory)
github.com/gocd/gocd/commit/f5c1d2aa9ab302a97898a6e4b16218e64fe8e9e4 (Patch, Third Party Advisory)
blog.sonarsource.com/gocd-vulnerability-chain (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43288?: CVE-2021-43288 is a medium-severity vulnerability in Thoughtworks Gocd, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-04-14.
How severe is CVE-2021-43288?: Medium severity. CVSS v3 base score is 5.4 out of 10.