CVE-2026-22254
Description
Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.
How to fix
- wintercms winter1.2.10 or later
- winter/wn-cms-module1.2.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wintercms winter | v < 1.2.10 | 1.2.10 |
| winter/wn-cms-modulePackagist | v < 1.2.10 | 1.2.10 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.