Actively exploited · Published Mar 4, 2024 · Assigned by JetBrains
CVE-2024-27199
High 7.3 Exploited Ransomware
In plain English
A high-severity security flaw in TeamCity from JetBrains. Attackers are actively exploiting it in the wild (listed by CISA on April 20, 2026). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 100.0% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by May 4, 2026.
Official description
In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible
Affected products (as reported)
Weakness: CWE-23 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
References
- https://www.jetbrains.com/privacy-security/issues-fixed/
- https://www.darkreading.com/cyberattacks-data-breaches/jetbrains-teamcity-mass-exploitation-underway-rogue-accounts-thrive
- https://github.com/Stuub/RCity-CVE-2024-27198/blob/main/RCity.py exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27199 government-resource