CVE-2026-109392— Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview
Quick assessment
Affected
Pimcore Pimcore
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.
Pimcore 2026.3.1 及之前版本存在一个存储型跨站脚本（XSS）漏洞，该漏洞允许经过认证的后台用户通过在 ExternalImage 字段中存储未转义的 URL 来注入恶意脚本。拥有数据对象编辑权限的攻击者可以存储破坏属性结构的恶意载荷，当其他用户查看版本预览或差异视图时，这些脚本将在管理后台的上下文中执行 JavaScript。
Possible ATT&CK Techniques 1 AI
T1059.007 · JavaScript
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I. Basic Information for CVE-2026-109392
Vulnerability Information
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Vulnerability Title
Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview
Source: CVE Program / CVE List V5
Vulnerability Description
Pimcore through 2026.3.1 contains a stored cross-site scripting vulnerability that allows authenticated backend users to inject scripts by storing unescaped URLs in ExternalImage fields. Attackers with data object edit permission can store attribute-breaking payloads that execute JavaScript in the admin origin when other users open version preview or diff views.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
II. Public POCs for CVE-2026-109392
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Patches & Fixes for CVE-2026-109392 (2)
Vendor Advisories for CVE-2026-109392 (1)
Security Blog Posts for CVE-2026-109392 (1)
Other References for CVE-2026-109392 (1)
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V. Comments for CVE-2026-109392
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