Authorization Bypass Through User-Controlled Key Affecting winter/wn-backend-module package, versions <1.2.12
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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- published13 Mar 2026
- disclosed11 Mar 2026
- creditAryan
Introduced: 11 Mar 2026
NewCVE-2026-27591 (opens in a new tab)How to fix?
Upgrade winter/wn-backend-module to version 1.2.12 or higher.
Overview
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the backend account management in FormController. An attacker can gain unauthorized access to higher privilege levels by sending specially crafted requests while authenticated as a backend user.
Note:
The fix was backported to 1.0.477 and 1.1.12 versions that are not available on Packagist yet.