Winter CMS: CSRF through AJAX handler names reachable as backend page actions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-125339
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-10 20:19:08 UTC
Updated2026-11-10 20:19:08 UTC
DescriptionWinter 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.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

Problem Types: CWE-352 | CWE-352 CWE-352: Cross-Site Request Forgery

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H
3.1CNADECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wintercms Winter affected >= 1.0.319, < 1.2.14 Not specified

References

ReferenceSourceLinkTags
github.com/wintercms/winter/security/advisories/GHSA-p2ch-c2c3-4xm5 [email protected] github.com
github.com/wintercms/winter/releases/tag/v1.2.14 [email protected] github.com
github.com/wintercms/winter/commit/353b23804dee2acf49fca996c72637040446824f [email protected] github.com
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