Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Winter CMS modules (winter/wn-cms-module) before 1.0.476, from 1.1.0 before 1.1.11, and from 1.2.0 before 1.2.7 contain a Twig sandbox bypass. A backend user who holds the cms.manage_layouts, cms.manage_pages, or cms.manage_partials permission can use it to modify theme resources and templates, or to change or delete model records, even without the permissions that would normally cover those actions. Upgrade to 1.0.476, 1.1.11, or 1.2.7. If you cannot upgrade, the source describes applying the fixing commit to your installation manually.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0042, the 36th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:03 UTC First seen by agentprime
- 31 Oct 2026, 14:03 UTC Confirmed by OSV