What is CVE-2021-25774?

CVE-2021-25774 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2021-02-03.

How severe is CVE-2021-25774?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Jetbrains Teamcity

CVE-2021-25774

In JetBrains TeamCity before 2020.2.1, a user could get access to the GitHub access token of another user.

Vulnerability class: Broken Access Control

Published 2021-02-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Jetbrains Teamcity

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

blog.jetbrains.com (Product)
blog.jetbrains.com/blog/2021/02/03/jetbrains-security-bulletin-q4-2020/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25774?: CVE-2021-25774 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2021-02-03.
How severe is CVE-2021-25774?: Medium severity. CVSS v3 base score is 4.3 out of 10.