Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2023-42793

JetBrains TeamCity Authentication Bypass Vulnerability

CriticalExploitation confirmedCISA KEV Used by ransomware
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run TeamCity, fix it now.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

US federal civilian agencies must remediate by Oct 25, 2023.

Patch status

No official fix confirmed yet

Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.

Description

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

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorAffected versionsFixed inSource
TeamCityJetBrains< 2023.05.42023.05.4KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2023-42793 scored CVSS 9.8: JetBrains TeamCity, JetBrains TeamCity Authentication Bypass Vulnerability

    CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched TeamCity systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • blog.jetbrains.com https://blog.jetbrains.com/teamcity/2023/09/critical-security-issue-affecting-teamcity-on-premises-update-to-2…
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2023-42793
  • packetstormsecurity.com http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html
  • attackerkb.com https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793
  • blog.jetbrains.com https://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/
  • jetbrains.com https://www.jetbrains.com/privacy-security/issues-fixed/
  • rapid7.com https://www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-tea…
  • securityweek.com https://www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/
  • sonarsource.com https://www.sonarsource.com/blog/teamcity-vulnerability/
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-42793