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CVE-2026-84793— Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site name

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.

从 5.0.0-RC1 到 5.10.11 之前的 Craft CMS 版本中，站点名称字段存在一个存储型跨站脚本（Stored Cross-Site Scripting, XSS）漏洞，该字段未对输入进行有效过滤（sanitize）。管理员可以在站点名称中注入任意 JavaScript 代码，当其他用户访问控制面板的设置页面时，这些代码将被执行。

CVSS 4.8 · Medium

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-84793

Vulnerability Information
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Vulnerability Title
Craft CMS 5.0.0-RC1 before 5.10.11 Stored XSS via site name
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS versions from 5.0.0-RC1 before 5.10.11 contain a stored cross-site scripting vulnerability in the site name field that fails to sanitize input. Administrators can inject arbitrary JavaScript payloads in the site name that execute when other users view the control panel settings pages.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms cms 5.0.0-RC1 ~ 5.10.11 -

II. Public POCs for CVE-2026-84793

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III. Intelligence Information for CVE-2026-84793

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Vendor Advisories for CVE-2026-84793 (2)

Same Patch Batch · craftcms · 2026-09-02 · 11 CVEs total

CVE-2026-84795 9.8 CRITICAL Craft CMS before 5.10.11 Authentication Bypass via Admin Flag Inheritance
CVE-2026-84801 8.8 HIGH Craft CMS 5.0.0-RC1 before 5.10.11 Authentication Bypass via administrateUsers
CVE-2026-84796 8.8 HIGH Craft CMS 5.0.0-RC1 before 5.10.11 GraphQL Entry Mutation Site Scope Bypass
CVE-2026-84794 7.1 HIGH Craft CMS 5.0.0 through 5.10.10 Authorization Bypass via assets/move-asset
CVE-2026-84800 7.1 HIGH Craft CMS 5.0.0-RC1 before 5.10.11 File Overwrite via assets/replace-file
CVE-2026-84798 7.1 HIGH Craft CMS before 5.10.11 Authorization Bypass via actionDeleteForSite
CVE-2026-84797 6.3 MEDIUM Craft CMS 5.0.0-RC1 before 5.10.11 Authorization Bypass via actionDuplicate
CVE-2026-84792 4.3 MEDIUM Craft CMS before 5.10.11 Broken Access Control via element-indexes
CVE-2026-84802 4.3 MEDIUM Craft CMS 5.7.0 before 5.10.12 Information Disclosure via AssetsController
CVE-2026-84799 4.3 MEDIUM Craft CMS before 5.11.0 PII Disclosure via GraphQL User Relations

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-84793

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