🛡️ CVE-2026-27591
🔴 CVSS 9.9 — Critical ✅ No Known Exploit CWE-284 NVD
9.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Prior to 1.0.477, 1.1.12, and 1.2.12, Winter CMS allowed authenticated backend users to escalate their accounts level of access to the system by modifying the roles / permissions assigned to their account through specially crafted requests to the backend while logged in. To actively exploit this security issue, an attacker would need access to the Backend with a user account with any level of access. This vulnerability is fixed in 1.0.477, 1.1.12, and 1.2.12.

Details

Severity CRITICAL
CVSS Score 9.9
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE CWE-284
Public Exploit ✅ No
Source NVD
Published 2026-03-11
Updated 2026-06-15
Modified 2026-03-19

Affected Packages

Software From version Fixed in
winter 1.2.0 1.2.12
winter/wn-backend-module — 1.0.477

Exploit Protection

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