Improper Handling of Insufficient Permissions or Privileges Affecting winter/wn-cms-module package, versions <1.2.13
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published12 Aug 2026
- disclosed12 Aug 2026
- creditUnknown
Introduced: 12 Aug 2026
CVE-2026-32639 (opens in a new tab)How to fix?
Upgrade winter/wn-cms-module to version 1.2.13 or higher.
Overview
Affected versions of this package are vulnerable to Improper Handling of Insufficient Permissions or Privileges in the Cms\Controllers\Index process. An attacker can gain unauthorized access to template types and upload assets by crafting AJAX requests with insufficient permission checks. This is only exploitable if the attacker has a backend user account with any single Theme Editor permission (such as cms.manage_pages, cms.manage_partials, cms.manage_layouts, cms.manage_content, or cms.manage_assets).
Workaround
This vulnerability can be mitigated by manually updating the permission checks in modules/cms/controllers/Index.php to wrap each widget registration with the appropriate hasAccess() check and adding validateRequestType() calls to relevant handlers. Additionally, add a $this->validateRequestTheme() call at the top of the onUpload() method in modules/cms/widgets/AssetList.php.