What is CVE-2021-36094?

CVE-2021-36094 is a medium-severity vulnerability in Otrs, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2021-09-06.

How severe is CVE-2021-36094?

Medium severity. CVSS v3 base score is 5.7 out of 10.

XSS in Otrs

CVE-2021-36094

It's possible to craft a request for appointment edit screen, which could lead to the XSS attack. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.28 and prior versions.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-09-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% 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

Otrs
Otrs Ag — versions 7.0.x
Otrs Ag ((Otrs)) Community Edition — versions 6.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

otrs.com/release-notes/otrs-security-advisory-2021-17/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-36094?: CVE-2021-36094 is a medium-severity vulnerability in Otrs, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2021-09-06.
How severe is CVE-2021-36094?: Medium severity. CVSS v3 base score is 5.7 out of 10.