JetBrains TeamCity - Authentication Bypass (CVE-2023-42793)

CVE-2023-42793 is a critical vulnerability in JetBrains TeamCity, where an authentication bypass can enable remote code execution on the TeamCity server.

CrowdSec has been tracking this vulnerability and its exploits since 15th of December 2023.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2023-42793 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2023-42793 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2023-42793 is currently experiencing high visibility and active exploitation across the internet.

Attack attempts aim to exploit weaknesses in the TeamCity authentication process, usually by targeting exposed server endpoints in tailored campaigns.