Paper/Archive/CVE-2026-79774

CVE-2026-79774

wintercms winter — Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
winter1.2.7 – < 1.2.131.2.13CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)8.4CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63wpatchgithub.com/wintercms/winter/commit/725bbcda232466f7f71381c271c6916573d576e6writeupvulncheck.com/advisories/winter-cms-before-twig-sandbox-escape-via-securitypolicy