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CVE-2026-84793

Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site name

MEDIUM
4.8
CVSS Score
Published: September 2, 2026 at 11:11 AM UTC
Updated: September 2, 2026 at 02:17 PM UTC
1 product affected across 1 vendorCraftcms

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Craftcms· Craftcmscomposer
95%
5.0.0 ≤ v < 5.10.115.0.0-RC1 ≤ v < 5.10.115.0.0-RC1
Vendor states this is fixed in 5.10.11 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/craftcms/cms/security/advisories/GHSA-5fjj-496j-2qqf
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.11-stored-xss-via-site-name

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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