Vulnerability in Jetbrains Teamcity
CVE-2023-42793
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
EPSS: 0.929 (99.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Jetbrains Teamcity — versions 0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- www.jetbrains.com/privacy-security/issues-fixed/
- blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/
- packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-…
- attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793
- www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-…
- www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-…
- www.sonarsource.com/blog/teamcity-vulnerability/
Frequently asked questions
- What is CVE-2023-42793?
- CVE-2023-42793 is a critical-severity vulnerability in Jetbrains Teamcity, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2023-09-19.
- How severe is CVE-2023-42793?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-42793 known to be exploited?
- Yes. CVE-2023-42793 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-10-04), indicating it is being actively exploited. 52 public proof-of-concept repositories are indexed.