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CVE-2026-32258— Winter: Stored XSS through Editor Settings custom styles

Quick assessment

Affected
wintercms winter
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Winter CMS Winter是Winter CMS组织开源的一款内容管理系统。 Winter CMS Winter 1.2.10版本至1.2.12版本存在跨站脚本漏洞，该漏洞源于经过身份验证的具有backend.manage_editor权限的后端用户可存储自定义Markup样式，该样式经LESS解析器编译后未进行清理即渲染，可能导致存储型跨站脚本。

CVSS 8.1 · High EPSS 0.38% · P31

Affected Version Matrix 1

VendorProduct Version RangeStatus
wintercms winter >= 1.2.10, < 1.2.13 affected
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I. Basic Information for CVE-2026-32258

Vulnerability Information
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Vulnerability Title
Winter: Stored XSS through Editor Settings custom styles
Source: CVE Program / CVE List V5
Vulnerability Description
Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. From 1.2.10 through 1.2.12, authenticated backend users with the backend.manage_editor permission can store custom Markup Styles that are compiled by the LESS parser and rendered without sanitization on every backend page, allowing stored cross-site scripting. 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:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Winter CMS Winter 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Winter CMS Winter是Winter CMS组织开源的一款内容管理系统。 Winter CMS Winter 1.2.10版本至1.2.12版本存在跨站脚本漏洞，该漏洞源于经过身份验证的具有backend.manage_editor权限的后端用户可存储自定义Markup样式，该样式经LESS解析器编译后未进行清理即渲染，可能导致存储型跨站脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wintercms winter >= 1.2.10, < 1.2.13 -

II. Public POCs for CVE-2026-32258

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8878 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-32258

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Patches & Fixes for CVE-2026-32258 (1)

Vendor Advisories for CVE-2026-32258 (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-2026-35445 7.1 HIGH Winter: Authenticated backend users can bypass Users controller permission checks
CVE-2026-32639 6.8 MEDIUM Winter: Broken access control in `Cms\Controllers\Index` allows cross-template actions and
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-79

V. Comments for CVE-2026-32258

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