Missing Authorization in TeamCity - CVE-2025-52878
Published: June 23, 2025 / Updated: August 17, 2026
Vulnerability identifier: #VU143907
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-52878
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose usernames.
The vulnerability exists due to improper access control in username handling when accessing user information without proper permissions. A remote user can access usernames they should not be able to view to disclose usernames.
Affected software
TeamCity
How to mitigate CVE-2025-52878
Install security update from vendor's website.
TeamCity - update to 2025.03.3