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CVE-2026-79774

CVE-2026-79774 · Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 9.3 · Critical · EPSS 0.8% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • winter

    Versions
    • ≥ 1.2.7, < 1.2.13: Affected (semver)
    • 1.2.13: Not affected (semver)

    Update to 1.2.13

  • winter/wn-system-module Packagist

    Versions
    • v1.2.10
    • v1.2.11
    • v1.2.12
    • v1.2.7
    • v1.2.8
    • v1.2.9
    Affected ranges
    • ECOSYSTEM: ≥ 1.2.7, < 1.2.13

    Update to 1.2.13

Original sources

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