What is CVE-2023-34220?

CVE-2023-34220 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2023-05-31.

How severe is CVE-2023-34220?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Is CVE-2023-34220 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Jetbrains Teamcity

CVE-2023-34220

In JetBrains TeamCity before 2023.05 stored XSS in the Commit Status Publisher window was possible

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.614 (99.2th percentile), scored 2026-10-29.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.612 · newest: 0.614 · change: +0.003

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

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

Frequently asked questions

What is CVE-2023-34220?: CVE-2023-34220 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2023-05-31.
How severe is CVE-2023-34220?: Medium severity. CVSS v3 base score is 4.6 out of 10.
Is CVE-2023-34220 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.