Teamcity - Authentication Bypass (CVE-2024-27198)

CVE-2024-27198 is a critical vulnerability in JetBrains TeamCity that allows unauthenticated attackers to bypass authentication controls and perform administrative actions.

CrowdSec has been tracking this vulnerability and its exploits since 19th of April 2024.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2024-27198 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. CrowdSec data also reveals a clear uptick in attacks involving CVE-2024-27198 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Exploitation attempts have been observed targeting URLs that include both ;.jsp and /app/rest/ in their path.