What is CVE-2025-52879?

CVE-2025-52879 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2025-06-23.

How severe is CVE-2025-52879?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Jetbrains Teamcity

CVE-2025-52879

In JetBrains TeamCity before 2025.03.3 reflected XSS in the NPM Registry integration was possible

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-06-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.012 · change: +0.002

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2025-52879?: CVE-2025-52879 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2025-06-23.
How severe is CVE-2025-52879?: Medium severity. CVSS v3 base score is 4.8 out of 10.