WinterCMS Winter up to 1.2.12 Twig SecurityPolicy privileges management

Summaryinfo

A vulnerability was found in WinterCMS Winter up to 1.2.12. It has been declared as problematic. This affects the function saveQuietly/deleteQuietly/increment/decrement/newQuery of the component Twig SecurityPolicy. The manipulation results in privileges management. This vulnerability is known as CVE-2026-79774. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in WinterCMS Winter up to 1.2.12. Affected is the function saveQuietly/deleteQuietly/increment/decrement/newQuery of the component Twig SecurityPolicy. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\Twig\\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent models and query builders using methods like saveQuietly(), deleteQuietly(), increment(), decrement(), and newQuery() to read and modify arbitrary database records, execute arbitrary SQL, and achieve remote code execution by injecting PHP into template code sections.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-79774 since 08/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation requires an enhanced level of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 1.2.13 eliminates this vulnerability.

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Productinfo

Vendor

• WinterCMS

Name

• Winter

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9
• 1.2.10
• 1.2.11
• 1.2.12

Website

• Product: https://github.com/wintercms/winter/

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Once again VulDB remains the best source for vulnerability data.

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