GHSA-xhw3-4j3m-hq53 · Severity: high · Ecosystem: composer — Winter CMS Modules allows a sandbox bypass in Twig templates leading to data modification and deletion
Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Winter CMS prior to versions 1.2.7, 1.1.11, and 1.0.476 allow users with access to the CMS templates sections that modify Twig files to bypass the sandbox placed on Twig files and modify resources such as theme customisation values or modify, or remove, templates in the theme even if not provided direct access via the permissions. As all objects passed through to Twig are references to the live objects, it is also possible to also manipulate model data if models are passed directly to Twig, including changing attributes or even removing records entirely. In most cases, this is unwanted behavior and potentially dangerous. To actively exploit this security issue, an attacker would need access to the Backend with a user account with any of the following permissions: `cms.manage_layouts`; `cms.manage_pages`; or `cms.manage_partials`. The Winter CMS maintainers strongly recommend that these permissions only be reserved to trusted administrators and developers in general. The maintainers of Winter CMS have significantly increased the scope of the sandbox, effectively making all models and datasources read-only in Twig, in versions 1.2.7, 1.1.11, and 1.0.476. Thse who cannot upgrade may apply commit fb88e6fabde3b3278ce1844e581c87dcf7daee22 to their Winter CMS installation manually to resolve the issue. In the rare event that a Winter user was relying on being able to write to models/datasources within their Twig templates, they should instead use or create components to make changes to their models.
Conclusion & alert: CVE-2024-54149 is rated Moderate Risk (44.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.40%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.07% | 0.40% | +0.33% |
| 2 | 2026-01-17 | 0.18% | 0.07% | -0.11% |
| 3 | 2025-11-21 | — | 0.18% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.4 | 3.1 | HIGH |
|
1.7 | 6.0 | [email protected] |
GHSA-xhw3-4j3m-hq53 · Severity: high · Ecosystem: composer — Winter CMS Modules allows a sandbox bypass in Twig templates leading to data modification and deletion