CVE-2023-42793
Published 2023-09-19 · Updated 2026-06-17 · Source cve@jetbrains.com
Summary
CVE-2023-42793 is a critical-severity (CVSS 9.8) vulnerability in JetBrains TeamCity. CISA added it to the Known Exploited Vulnerabilities catalog on October 4, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by October 25, 2023. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. JetBrains has 4 vulnerabilities in the KEV catalog, 4 of them linked to ransomware.
All 4 known-exploited JetBrains vulnerabilities →Description
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: JetBrains — TeamCity
Name: JetBrains TeamCity Authentication Bypass Vulnerability
Date added: 2023-10-04 · Due: 2023-10-25
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
- http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html
- https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793
- https://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/
- https://www.jetbrains.com/privacy-security/issues-fixed/
- https://www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers/
- https://www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/
- https://www.sonarsource.com/blog/teamcity-vulnerability/
- http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html