CVE-2023-42793 on CISA KEV

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

01What CISA says about this vulnerability

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

02Required action — verbatim from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

03Notes & references

• www.jetbrains.com — https://www.jetbrains.com/privacy-security/issues-fixed/
• blog.jetbrains.com — https://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mo…
• packetstormsecurity.com — http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-R…
• attackerkb.com — https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793
• www.securityweek.com — https://www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-t…
• www.rapid7.com — https://www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authenti…
• www.sonarsource.com — https://www.sonarsource.com/blog/teamcity-vulnerability/

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
JetBrains	TeamCity	0

06Detection

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