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Critical 9.8Known exploited (CISA KEV)Published Sep 19, 2023
CVE-2023-42793In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
Updated under an hour ago ()
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CISA lists it as known exploited since Oct 4, 2023; federal agencies had to remediate by Oct 25, 2023, and it is known to be used in ransomware. Treat that date as your deadline.
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In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-288
- Known exploited
- Added to CISA KEV Oct 4, 2023; federal remediation due Oct 25, 2023; known ransomware useApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 99.99% (percentile 100)
- Assigned by
- JetBrains
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
JetBrains TeamCity jetbrains:teamcity (from the name) | before 2023.05.4 | CNA record |
jetbrains teamcity jetbrains:teamcity | before 2023.05.4 | NVD |
References
- https://www.jetbrains.com/privacy-security/issues-fixed/vendor-advisory
- https://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/vendor-advisory
- http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.htmlexploit, third-party-advisory, vdb-entry
- https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793third-party-advisory
- https://www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/press/media-coverage
- https://www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers/broken-link, third-party-advisory
- https://www.sonarsource.com/blog/teamcity-vulnerability/exploit, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-42793us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.