How severe is CVE-2024-27198?

CVE-2024-27198 has a CVSS 3.1 base score of 9.8 (CRITICAL). EPSS estimates a 99.9% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2024-27198: JetBrains TeamCity Authentication Bypass Vulnerability

CISA Known Exploited Vulnerabilities

JetBrains TeamCity Authentication Bypass Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2024-03-07

Remediation due

2024-03-28

Ransomware

Known use

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

CISA notes
https://www.jetbrains.com/help/teamcity/teamcity-2023-11-4-release-notes.html; https://blog.jetbrains.com/teamcity/2024/03/additional-critical-security-issues-affecting-teamcity-on-premises-cve-2024-27198-and-cve-2024-27199-update-to-2023-11-4-now/ ; https://nvd.nist.gov/vuln/detail/CVE-2024-27198

Description

In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible

Severity

CVSS 3.1 · CNA9.8 CRITICAL

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Exploitation Context

as of October 13, 2026

All KEV statistics→

CISA added CVE-2024-27198 to the KEV catalog 3 days after its CVE record was published. The median for entries added in 2024 is 21.5 days.
It is one of 4 JetBrains entries in the CISA KEV catalog, and the only one added in 2024.
Its current EPSS score (99.9%) is higher than that of 93% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
JetBrains	JetBrains TeamCity	0 to <2023.11.4

References

2 Links

Other references

Record Details

Published

2024-03-04

Last updated

2025-10-21

Assigner (CNA)

JetBrains

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.