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Medium · 4.3 CVE-2026-126061 EUVD-2026-122903GHSA-mpmw-f6h6-3g26

Winter CMS: My Account preview exposes another backend user's profile by record ID

Published Nov 10, 2026 · Updated Nov 14, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
wintercms winter >= 1.2.13, < 1.2.14 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist winter/wn-backend-module >= 1.2.13, < 1.2.14 1.2.14 GHSA-mpmw-f6h6-3g26

References