What is CVE-2021-44263?

CVE-2021-44263 is a medium-severity vulnerability in Gurock Testrail, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-12-20.

How severe is CVE-2021-44263?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Gurock Testrail

CVE-2021-44263

Gurock TestRail before 7.2.4 mishandles HTML escaping.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Gurock Testrail

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gist.github.com/miglen/b09498b4b9fe1be58973bd474af125ab (Exploit, Third Party Advisory)
discuss.gurock.com/t/testrail-7-2-4-released-to-cloud/20248 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-44263?: CVE-2021-44263 is a medium-severity vulnerability in Gurock Testrail, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-12-20.
How severe is CVE-2021-44263?: Medium severity. CVSS v3 base score is 5.4 out of 10.