cvedb.io
CVE-2026-27591
CRITICAL · CVSS 9.9
EPSS exploitation probability: 0%
Published 2026-03-11T22:16:32.290 · Last modified 2026-06-17T10:27:21.463

Summary

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.

Affected products

wintercms — winter

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.