CVE-2026-27591

Published: Mar 11, 2026 Last Modified: Mar 12, 2026
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,9
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0006
Percentile
0,2th
Updated

EPSS Score Trend (Last 6 Days)

284

Improper Access Control

Incomplete
Abstraction: Pillar Structure: Simple
Common Consequences
Security Scopes Affected:
Other
Potential Impacts:
Varies By Context
Applicable Platforms
Technologies: ICS/OT, Not Technology-Specific, Web Based
View CWE Details
639

Authorization Bypass Through User-Controlled Key

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Other
Potential Impacts:
Modify Application Data Execute Unauthorized Code Or Commands Varies By Context Alter Execution Logic
Applicable Platforms
Languages: ASP.NET, Not Language-Specific, PHP, Python, Ruby
View CWE Details
https://github.com/wintercms/winter/security/advisories/GHS…
https://github.com/wintercms/winter/security/advisories/GHSA-pgpf-m8m4-6cg6
https://wintercms.com/releases/v1.0.477
https://wintercms.com/releases/v1.0.477
https://wintercms.com/releases/v1.1.12
https://wintercms.com/releases/v1.1.12
https://wintercms.com/releases/v1.2.12
https://wintercms.com/releases/v1.2.12