Medium severity · published Sep 2, 2026
CVE-2026-84793
Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site name
4.8
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
5.0.0-RC1 before 5.10.11 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84793
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84793
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-5fjj-496j-2qqf
www.vulncheck.com
https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.11-stored-xss-via-site-name
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