Medium severity · published Jun 21, 2026
CVE-2026-56393
Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options
4.8
CVSS
0.2%
EPSS
No
On KEV
Description
Craft CMS 4.x (>= 4.0.0-RC1, < 4.17.0-beta.1) and 5.x (>= 5.0.0-RC1, < 5.9.0-beta.1) contain multiple stored cross-site scripting vulnerabilities where settings names and field option labels are rendered without sanitization (e.g., via the checkbox.twig template, which used {{ label|raw }}). An authenticated administrator (with allowAdminChanges enabled) can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels, causing arbitrary JavaScript to execute in other users' control-panel sessions. Fixed in 4.17.0-beta.1 and 5.9.0-beta.1.
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)0.2% · higher than 13% 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 5.9.0-beta.1; 4.0.0-RC1 before 4.17.0-beta.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56393
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56393
github.com
https://github.com/craftcms/cms/commit/67780a778c6ec04e68e64a0b1177c168306144a2
github.com
https://github.com/craftcms/cms/commit/943152d2246b36f12adf161a03b8695b773d9276
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-4mgv-366x-qxvx
www.vulncheck.com
https://www.vulncheck.com/advisories/craft-cms-multiple-stored-cross-site-scripting-in-settings-names-and-field-options
More from cms
10.0
CVE-2025-32432
Craft CMS Allows Remote Code Execution
9.8
CVE-2024-56145
RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms
8.1
CVE-2025-23209
Potential RCE with a compromised security key in craft/cms
9.8
CVE-2026-112776
Craft CMS 5.0.0 before 5.11.0 GraphQL Site-Scope Bypass via Mutations
9.8
CVE-2026-84795
Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance