Authentication bypass using an alternate path or channel in TeamCity - CVE-2023-42793
Published: September 21, 2023 / Updated: August 22, 2025
Vulnerability identifier: #VU80950
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-42793
CWE-ID: CWE-288
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an authentication bypass using an alternate path. A remote attacker can bypass authentication and execute arbitrary code on the system.
Affected software
TeamCity
How to mitigate CVE-2023-42793
Install updates from vendor's website.
TeamCity - update to 2023.05.4
Links to Public Exploits and PoC-codes
- Exploit #11879 - CVE-2023-42793 (JetBrains TeamCity 2023.05.3 - Remote Code Execution (RCE), CVE-2023-42793) (August 22, 2025)
- Exploit #10780 - CVE-2023-42793 (PoC of CVE-2023-42793) (October 30, 2024)
- Exploit #10750 - JetBrains TeamCity 2023.05.3 - Remote Code Execution (RCE) (October 25, 2024)
- Exploit #10535 - teamcity-exploit-cve-2023-42793 (teamcity-exploit-cve-2023-42793) (September 27, 2024)
- Exploit #9837 - CVE-2023-42793 (JetBrains TeamCity 2023.05.3 - Remote Code Execution (RCE), CVE-2023-42793) (May 23, 2024)
- Exploit #9571 - GhostTown (Proof of Concept script to exploit CVE-2023-42793 (TeamCity)) (February 27, 2024)
- Exploit #9455 - CVE-2023-42793 (JetBrains TeamCity Authentication Bypass CVE-2023-42793 Exploit) (December 21, 2023)
- Exploit #9365 - JetBrains TeamCity Unauthenticated Remote Code Execution (September 28, 2023)