CVSS 3.1
6.1 mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:HCVE-2026-125339 Winter CMS: CSRF through AJAX handler names reachable as backend page actions
Medium (6.1) in wintercms winter. EPSS 0.2% estimated probability of exploitation activity in the next 30 days. Fixed in winter/wn-backend-module 1.2.14.
On this page
Winter CMS is a content management system built on the Laravel PHP framework. From 1.0.319 until 1.2.14, Backend\Classes\Controller::actionExists() accepts public handler-shaped methods as page actions, so a top-level GET request can invoke state-changing backend AJAX handlers without a CSRF token. Because backend routes use Route::any, CSRF validation skips GET, and the default SameSite=Lax session cookie is sent on cross-site navigation, an unauthenticated attacker can induce an authorized backend user to follow a link such as /backend/system/eventlogs/index_onEmptyLog. Affected handlers in the backend, CMS, and system modules can truncate logs, reset settings, alter backend user state, or delete CMS templates, while URL path segments can select a target record. This issue is fixed in version 1.2.14.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 7th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: partial, assessed 2026-11-12. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-352 Cross-Site Request Forgery (Cross Site Reference Forgery)
- OWASP Top 10
- A01:2025 Broken Access Control
- Published
- Modified
- Assigned by
- GitHub_M (CNA)
- NVD analysis
- Deferred: the NVD does not plan to analyze it
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| wintercms winter | >= 1.0.319, < 1.2.14 |
Fix and patched versions
winter/wn-backend-module(Packagist): fixed in 1.2.14
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p2ch-c2c3-4xm5 | Packagist | winter/wn-backend-module | >=1.0.319 <1.2.14 | 1.2.14 |
Attack patterns (CAPEC)
- CAPEC-62 Cross Site Request Forgery Likelihood: High · Severity: Very High
- CAPEC-111 JSON Hijacking (aka JavaScript Hijacking) Likelihood: High · Severity: High
- CAPEC-462 Cross-Domain Search Timing Severity: Medium
- CAPEC-467 Cross Site Identification Severity: Low
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
History
- The NVD deferred its analysis
Changes since this site first stored the record. The same for every record: /api/public/changes.