QwikSec

Security Database

CVE

CWE

Training

CVE-2026-27591

Published: Mar 11, 2026

Modified: Mar 12, 2026

PUBLISHED

CVSS v3.1

10.0

CRITICAL

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.

Vendor	Product	Versions
wintercms	winter	affected `>= 1.2.0, < 1.2.12` affected `>= 1.1.0, < 1.1.12` affected `< 1.0.477`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

https://github.com/wintercms/winter/security/advisories/GHSA-pgpf-m8m4-6cg6

x_refsource_CONFIRM

https://wintercms.com/releases/v1.0.477

x_refsource_MISC

https://wintercms.com/releases/v1.1.12

x_refsource_MISC

https://wintercms.com/releases/v1.2.12

x_refsource_MISC

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