Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-32639— Winter: Broken access control in `Cms\Controllers\Index` allows cross-template actions and unauthorized asset uploads

Quick assessment

Affected
wintercms winter
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Winter CMS 是基于 Laravel PHP 框架构建的内容管理系统。在 1.2.12 及之前版本中，CMS 部分的“主题编辑器”AJAX 处理程序未针对每种模板类型执行细粒度的权限检查，导致拥有任意一项 CMS 权限的后端用户可以在其授权范围之外的模板类型上执行操作。 具体来说，CMS 控制器使用“或”逻辑（OR-logic）基于五个 CMS 权限来对整个 CMS 部分进行访问控制，但像 、 和 等独立处理程序并未验证用户是否持有针对所请求模板类型的特定权限。因此，一个仅拥有 权限的用户，可以通过构造 A

CVSS 6.8 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
wintercms winter < 1.2.13 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-32639

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Winter: Broken access control in `Cms\Controllers\Index` allows cross-template actions and unauthorized asset uploads
Source: CVE Program / CVE List V5
Vulnerability Description
Winter CMS is a content management system built on the Laravel PHP framework. In versions up to and including 1.2.12, the CMS section's Theme Editor AJAX handlers did not enforce per-template-type permission checks, allowing a backend user with any single CMS permission to act on template types outside their authorized scope. The CMS controller gated access to the section as a whole using OR-logic across its five permissions, but individual handlers such as onSave(), onDelete(), and onDeleteTemplates() did not verify that the user held the specific permission for the requested template type, so a user with only cms.manage_pages could craft AJAX requests to delete layouts, modify partials, or read content files. Separately, the AssetList widget was registered for any user who passed the controller gate regardless of the cms.manage_assets permission, and its onUpload() handler omitted the theme-validation call present on the other mutating handlers, permitting unauthorized file uploads into the active theme's asset directory. Exploitation requires an authenticated backend account holding at least one of the CMS Theme Editor permissions. This issue is fixed in version 1.2.13.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选名称进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wintercms winter < 1.2.13 -

II. Public POCs for CVE-2026-32639

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-32639

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-32639 (2)

Vendor Pages for CVE-2026-32639 (1)

Same Patch Batch · wintercms · 2026-08-26 · 7 CVEs total

CVE-2026-32257 8.1 HIGH Winter: Stored XSS through Brand Settings custom styles
CVE-2026-32258 8.1 HIGH Winter: Stored XSS through Editor Settings custom styles
CVE-2026-35445 7.1 HIGH Winter: Authenticated backend users can bypass Users controller permission checks
CVE-2026-32593 5.9 MEDIUM Winter: SQL Injection in Backend Filter Widget numberrange Scope via numbersFromAjax
CVE-2026-54256 5.4 MEDIUM Winter: Authenticated IDOR in backend FileUpload widget allows cross-user access to attach
CVE-2026-63179 4.9 MEDIUM Winter: Local File Inclusion through @import directives in LESS compilation of backend cus

IV. Related Vulnerabilities

Same product: winter
Same vendor: wintercms
Same weakness: CWE-289

V. Comments for CVE-2026-32639

No comments yet

Leave a comment