JetBrains TeamCity Authentication Bypass Vulnerability

CRITICAL 9.8EXPLOITED (CISA KEV)CVE-2023-42793 · Published 19/09/2023 · updated 17/06/2026

JetBrains TeamCity Authentication Bypass Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 04/10/2023. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.

Package	Affected versions	Patched versions
teamcity jetbrains	`< 2023.05.4`	`2023.05.4`

Description

In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible

References

packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html · Exploit
attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793 · Third Party Advisory
blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem · Vendor Advisory
jetbrains.com/privacy-security/issues-fixed · Vendor Advisory
rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers · Broken Link
securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers · Press/Media Coverage
sonarsource.com/blog/teamcity-vulnerability · Exploit
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2023-42793

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