DOM-based XSS in GoCD

Vulnerability Description

GoCD is a continuous delivery server. GoCD versions 19.11.0 through 21.4.0 (inclusive) are vulnerable to a Document Object Model (DOM)-based cross-site scripting attack via a pipeline run's Stage Details > Graphs tab. It is possible for a malicious script on a attacker-hosted site to execute script that will run within the user's browser context and GoCD session via abuse of a messaging channel used for communication between with the parent page and the stage details graph's iframe. This could allow an attacker to steal a GoCD user's session cookies and/or execute malicious code in the user's context. This issue is fixed in GoCD 22.1.0. There are currently no known workarounds.

References

• https://github.com/gocd/gocd/releases/tag/22.1.0
• https://www.gocd.org/releases/#22-1-0
• https://github.com/gocd/gocd/security/advisories/GHSA-qcg6-4q44-3589
• https://github.com/gocd/gocd/pull/10190/commits/a256d05de1445e6c77843f098581fc6a66fe4477