CVE-2026-79774
Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy
CVSS Score
8.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-693 |
| Vendor | wintercms |
| Product | winter |
| Published | Aug 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for wintercms winter
Be the first to know when new high vulnerabilities affecting wintercms winter are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
wintercms / winter
1.2.7 < 1.2.13
References
Credits
🔍 M9nx