What is CVE-2023-34218?

CVE-2023-34218 is a critical-severity vulnerability in Jetbrains Teamcity, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2023-05-31.

How severe is CVE-2023-34218?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Jetbrains Teamcity

CVE-2023-34218

In JetBrains TeamCity before 2023.05 bypass of permission checks allowing to perform admin actions was possible

Vulnerability class: Broken Access Control

Published 2023-05-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.6th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.jetbrains.com/privacy-security/issues-fixed/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34218?: CVE-2023-34218 is a critical-severity vulnerability in Jetbrains Teamcity, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2023-05-31.
How severe is CVE-2023-34218?: Critical severity. CVSS v3 base score is 9.1 out of 10.