CVE-2026-31859— Craft has Reflective XSS via incomplete return URL sanitization
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I. Basic Information for CVE-2026-31859
Vulnerability Information
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Vulnerability Title
Craft has Reflective XSS via incomplete return URL sanitization
Source: NVD (National Vulnerability Database)
Vulnerability Description
Craft is a content management system (CMS). The fix for CVE-2025-35939 in craftcms/cms introduced a strip_tags() call in src/web/User.php to sanitize return URLs before they are stored in the session. However, strip_tags() only removes HTML tags (angle brackets) -- it does not inspect or filter URL schemes. Payloads like javascript:alert(document.cookie) contain no HTML tags and pass through strip_tags() completely unmodified, enabling reflected XSS when the return URL is rendered in an href attribute. This vulnerability is fixed in 5.9.7 and 4.17.3.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
Crafter CMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Crafter CMS是一套面向数字体验应用程序的开源内容管理系统（CMS）。 Crafter CMS 5.9.7之前版本和4.17.3之前版本存在安全漏洞，该漏洞源于strip_tags函数无法过滤URL方案，可能导致反射型跨站脚本攻击。
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
II. Public POCs for CVE-2026-31859
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Same Patch Batch · craftcms · 2026-03-11 · 4 CVEs total
| CVE-2026-31857 | CraftCMS has an RCE vulnerability via relational conditionals in the control panel | |
| CVE-2026-31867 | Craft Commerce has a Potential IDOR in Commerce carts | |
| CVE-2026-31858 | CraftCMS's `ElementSearchController` Affected by Blind SQL Injection |
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V. Comments for CVE-2026-31859
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