CVE-2023-42793
JetBrains TeamCity Authentication Bypass Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 25 October 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.99% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 14 March 2024
- CISA KEV
- Listed 4 October 2023 · due 25 October 2023 · used in ransomware campaigns
- Weakness
- CWE-288, CWE-306
- Affected
- jetbrains/teamcity
- Source
- cve@jetbrains.com
EPSS 100.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://blog.jetbrains.com/teamcity/2023/09/critical-security-issue-affecting-teamcity-on-premises-update-to-2023-05-4-now/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-42793
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- 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://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/Vendor Advisory
- https://www.jetbrains.com/privacy-security/issues-fixed/Vendor Advisory
- 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.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/Press/Media Coverage
- https://www.sonarsource.com/blog/teamcity-vulnerability/Exploit, Third Party 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://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/Vendor Advisory
- https://www.jetbrains.com/privacy-security/issues-fixed/Vendor Advisory
- 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.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/Press/Media Coverage
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-42793US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.