CVE-2026-126061
Winter CMS: My Account preview exposes another backend user's profile by record ID
Winter CMS is a content management system built on the Laravel PHP framework. From 1.2.13 until 1.2.14, the Backend\Controllers\MyAccount controller inherits the FormController actions create, update, and preview while declaring an empty $requiredPermissions array, and formFindModelObject() resolves a caller-supplied record identifier through an unscoped Backend\Models\User query. Any authenticated backend user can request another sequential user identifier through /backend/backend/myaccount/preview/{other_user_id} or the inherited update action and read profile data including name, login, email, avatar, role, group membership, superuser status, and throttle state. Password material is not exposed, and existing model authorization guards block cross-user writes. This issue is fixed in version 1.2.14.
Fixes and workarounds
Fix
winter/wn-backend-module (composer): GitHub reports patched versions >= 1.2.14. Check the advisory for the affected release branch.
Source: GitHub GHSA-mpmw-f6h6-3g26Fix
winter/wn-backend-module (Packagist): OSV reports a fixed version 1.2.14. Check the advisory for supported release branches.
Source: OSV GHSA-mpmw-f6h6-3g26Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| winter wintercms |
>= 1.2.13, < 1.2.14 (affected) | CNA: GitHub_M |
winter/wn-backend-modulewinter/wn-backend-module
composer |
1.2.13 (affected, GitHub advisory range) | GitHub GHSA-mpmw-f6h6-3g26 |
winter/wn-backend-modulewinter/wn-backend-module
Packagist |
1.2.13 (affected, Packagist) v1.2.13 (affected, Packagist) Ecosystem version events: introduced 1.2.13; fixed 1.2.14 Source events (ECOSYSTEM)Other versions: unaffected |
OSV GHSA-mpmw-f6h6-3g26 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | CNA: GitHub_M |
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/wintercms/winter/commit/cdbc8f5a23db27f72ccec658a8e5769e6d9f6dcbCNA: GitHub_M · x_refsource_MISC
- https://github.com/wintercms/winter/releases/tag/v1.2.14CNA: GitHub_M · x_refsource_MISC
- https://github.com/wintercms/winter/commit/cdbc8f5a23db27f72ccec658a8e5769e6d9f6dcb[email protected]
- https://github.com/wintercms/winter/releases/tag/v1.2.14[email protected]
- https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26[email protected]
- https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26GitHub Security Advisories · advisory
- https://github.com/advisories/GHSA-mpmw-f6h6-3g26OSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-mpmw-f6h6-3g26OSV / GitHub Security Advisories · osv
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