Cross-site scripting in TeamCity - CVE-2025-52879
Published: June 23, 2025 / Updated: August 17, 2026
Vulnerability identifier: #VU143906
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2025-52879
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script code in a victim's browser.
The vulnerability exists due to cross-site scripting in the NPM Registry integration when handling requests. A remote attacker can send a specially crafted request to execute arbitrary script code in a victim's browser.
Affected software
TeamCity
How to mitigate CVE-2025-52879
Install security update from vendor's website.
TeamCity - update to 2025.03.3