CVE-2026-54256
1 advisory.
Packagist/winter/wn-backend-module CVE-2026-54256: medium 5.4, EPSS 0.24%
Winter: Authenticated IDOR in backend FileUpload widget allows cross-user access to attachment metadata
Action: Upgrade winter/wn-backend-module to 1.2.13 or later.
composer require winter/wn-backend-module:1.2.13Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1.2.13 | - |
Fixed versions
| 1.2.13 |
Sources
- osv: GHSA-3277-h8g9-qj5f
- https://github.com/wintercms/winter/security/advisories/GHSA-3277-h8g9-qj5f
- https://github.com/wintercms/winter/security/advisories/GHSA-qq9m-vfv4-pj5w
- https://github.com/wintercms/winter/commit/9cb0ae5f9d837db141ab111c6a7de8eed9603d25
- https://github.com/wintercms/winter
- https://github.com/wintercms/winter/releases/tag/v1.2.13
CVE-2026-54256 · published · modified · JSON