CVEs / CVE-2023-42793
CVE-2023-42793: JetBrains TeamCity Authentication Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 4 Oct 2023
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 99.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
JetBrains TeamCity contains an authentication bypass vulnerability that allows for remote code execution on TeamCity Server.
Description
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| JetBrains TeamCity | before 2023.05.4 | 2023.05.4 |
Exploitation
| In CISA KEV since | 4 Oct 2023 |
|---|---|
| Due date for US federal agencies | 25 Oct 2023 |
| Used in ransomware campaigns | Known |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-288, CWE-306 |
References
- CVE-2023-42793 on NVD
- CVE-2023-42793 in the CISA KEV catalog
- https://blog.jetbrains.com/teamcity/2023/09/critical-security-issue-affecting-teamcity-on-premises-update-to-2023-05-4-now/ (cited by CISA)
- http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
- https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793 Third 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
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-42793 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.