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CVE-2026-56381— Craft CMS - Stored XSS via User Group Name in User Permissions Page

Quick assessment

Affected
craftcms cms
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.

CraftCMS cms是CraftCMS的内容管理系统。 craftcms cms 5.0.0-RC1版本及之前版本存在跨站脚本漏洞，该漏洞源于用户权限页面中用户组名称呈现时未进行适当的HTML转义，可能导致具有管理员权限的攻击者注入任意JavaScript。以下版本受到影响：5.8.22版本之前的5.0.0-RC1版本。

CVSS 4.8 · Medium EPSS 0.25% · P15

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms 5.0.0-RC1< 5.8.22 affected
5.8.22 unaffected
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I. Basic Information for CVE-2026-56381

Vulnerability Information
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Vulnerability Title
Craft CMS - Stored XSS via User Group Name in User Permissions Page
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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
Craft CMS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CraftCMS cms是CraftCMS的内容管理系统。 craftcms cms 5.0.0-RC1版本及之前版本存在跨站脚本漏洞，该漏洞源于用户权限页面中用户组名称呈现时未进行适当的HTML转义，可能导致具有管理员权限的攻击者注入任意JavaScript。以下版本受到影响：5.8.22版本之前的5.0.0-RC1版本。
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
craftcms cms 5.0.0-RC1 ~ 5.8.22 -

II. Public POCs for CVE-2026-56381

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III. Intelligence Information for CVE-2026-56381

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Vendor Advisories for CVE-2026-56381 (2)

Same Patch Batch · craftcms · 2026-06-21 · 7 CVEs total

CVE-2026-56382 7.2 HIGH Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController
CVE-2026-56394 6.5 MEDIUM Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter
CVE-2026-56383 4.8 MEDIUM Craft CMS - Stored XSS in Table Field via Row Heading Column Type
CVE-2026-56393 4.8 MEDIUM Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options
CVE-2026-56384 4.3 MEDIUM Craft CMS - Missing Authorization in assets/preview-thumb Endpoint
CVE-2026-56385 4.3 MEDIUM Craft CMS - Authorization Bypass in assets/preview-file Endpoint

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-79

V. Comments for CVE-2026-56381

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