What is CVE-2026-84793?

CVE-2026-84793 is a medium-severity vulnerability in Craftcms Cms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-09-02.

How severe is CVE-2026-84793?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Craftcms Cms

CVE-2026-84793

Craft CMS versions from 5.0.0-RC1 before 5.10.11 contain a stored cross-site scripting vulnerability in the site name field that fails to sanitize input. Administrators can inject arbitrary JavaScript payloads in the site name that execute when other users view the control panel settings pages.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Craftcms Cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-84793?: CVE-2026-84793 is a medium-severity vulnerability in Craftcms Cms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-09-02.
How severe is CVE-2026-84793?: Medium severity. CVSS v3 base score is 4.8 out of 10.