What is CVE-2019-14953?

CVE-2019-14953 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-10-01.

How severe is CVE-2019-14953?

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

XSS in Jetbrains Youtrack

CVE-2019-14953

JetBrains YouTrack versions before 2019.2.53938 had a possible XSS through issue attachments when using the Firefox browser.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-10-01 · 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: 0.009 (57.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

blog.jetbrains.com/blog/2019/09/26/jetbrains-security-bulletin-q2-2019/ (Vendor Advisory)

Frequently asked questions

What is CVE-2019-14953?: CVE-2019-14953 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-10-01.
How severe is CVE-2019-14953?: Medium severity. CVSS v3 base score is 6.1 out of 10.