CVE-2023-42793

Name: CVE-2023-42793
Creator: NVD / NIST
Published: 2023-09-19T17:15:08.33+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.98%

Last modified Jun 17, 2026

CVE-2023-42793 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.98% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

99.98%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Oct 25, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Jetbrains	Teamcity	< 2023.05.4

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

Timeline

Published: Sep 19, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-42793?

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

How severe is CVE-2023-42793?

CVE-2023-42793 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.98% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-42793?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-42793?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST