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CVE Record

CVE-2021-43288: An issue was discovered in ThoughtWorks GoCD before 21.3.0.

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

GoCD versions before 21.3.0 allowed a malicious or compromised GoCD Agent to place JavaScript in a failed job report. That script could run when someone views the report in GoCD, turning a build failure page into a browser-side attack surface. Public data does not provide CVSS scoring or confirmed exploitation.

Executive priority

Prioritize remediation if GoCD supports production delivery or stores sensitive pipeline data. The known prerequisite lowers broad internet-scale urgency, but a compromised CI/CD agent can create business impact beyond a normal web page issue.

Technical view

The CVE describes stored JavaScript injection through failed Job Report content when the attacker controls a GoCD Agent. The affected scope is stated as ThoughtWorks GoCD before 21.3.0. Available sources point to the 21.3.0 release, a GoCD commit, and SonarSource research, but the bundle does not include CWEs or CVSS details.

Likely exposure

Exposure is most likely in GoCD environments running versions before 21.3.0, especially where agents are less trusted, shared, or reachable by third parties. Organizations without GoCD or already on 21.3.0 or later are less likely to be exposed based on the supplied sources.

Exploitation context

No source in the bundle states active exploitation, and CISA KEV is false. The stated prerequisite is control of a GoCD Agent, which narrows the threat but remains important because CI/CD systems often handle credentials, artifacts, and privileged operational workflows.

Researcher notes

The source bundle lacks CVSS, CWE, and detailed affected CPE data. Analysis should remain limited to GoCD before 21.3.0 and the described failed Job Report JavaScript injection path. Do not assume broader product impact or active exploitation without new evidence.

Mitigation direction

  • Upgrade GoCD to version 21.3.0 or later.
  • Review GoCD 21.3.0 release notes and vendor guidance.
  • Restrict and monitor who can register or control GoCD Agents.
  • Treat untrusted or shared agents as higher risk.
  • Review failed job report handling after upgrade.

Validation and detection

  • Inventory GoCD server versions and confirm none are before 21.3.0.
  • Identify all registered GoCD Agents and their trust boundaries.
  • Review failed job reports for unexpected script-like content.
  • Check access logs for unusual report viewing or agent activity.
  • Confirm remediation against the referenced GoCD commit or release notes.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-43288 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.