What is CVE-2020-27627?

CVE-2020-27627 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2020-11-16.

How severe is CVE-2020-27627?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Jetbrains Teamcity

CVE-2020-27627

JetBrains TeamCity before 2020.1.2 was vulnerable to URL injection.

Published 2020-11-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% 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-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

blog.jetbrains.com (Vendor Advisory)
blog.jetbrains.com/2020/11/16/jetbrains-security-bulletin-q3-2020/ (Vendor Advisory)

Frequently asked questions

What is CVE-2020-27627?: CVE-2020-27627 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2020-11-16.
How severe is CVE-2020-27627?: Medium severity. CVSS v3 base score is 6.1 out of 10.