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CVE-2026-27591

CRITICAL

9.9

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 CVE

Score CVSS v3.19.9

SeveriteCRITICAL

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

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie3/11/2026

Derniere modification3/19/2026

Sourcenvd

Observations honeypot0

Produits affectes

wintercms:winter

Faiblesses (CWE)

CWE-284CWE-639CWE-915

References

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

https://wintercms.com/releases/v1.0.477(security-advisories@github.com)

https://wintercms.com/releases/v1.1.12(security-advisories@github.com)

https://wintercms.com/releases/v1.2.12(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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