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CVE-2026-54087— EasyAdmin: Stored Cross-Site Scripting (XSS) via uploaded files served inline in FileField and ImageField

Quick assessment

Affected
EasyCorp EasyAdminBundle
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.

EasyAdmin 是一款面向 Symfony 应用的快速且现代的后台管理框架生成器。在版本 5.0.0 至 5.0.13 中， 和 允许上传浏览器可执行文件，而 模板通过链接直接内联渲染存储的文件，且未添加 属性或 响应头。当上传文件存储在公共 Web 根目录下时，能够访问受影响表单的攻击者可以通过 上传 HTML 文件，或通过 上传 SVG 文件；当文件从后台被打开时，JavaScript 代码将在已认证管理员的源（origin）上下文中执行。利用此漏洞需要上传者与查看者之间存在权限差异。该漏洞可能导致会话令牌

CVSS 7.6 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
EasyCorp EasyAdminBundle >= 5.0.0, < 5.0.13 affected
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I. Basic Information for CVE-2026-54087

Vulnerability Information
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Vulnerability Title
EasyAdmin: Stored Cross-Site Scripting (XSS) via uploaded files served inline in FileField and ImageField
Source: CVE Program / CVE List V5
Vulnerability Description
EasyAdmin is a fast and modern admin generator for Symfony applications. From 5.0.0 until 5.0.13, FileField and ImageField can accept browser-executable uploads while templates/crud/field/file.html.twig links to stored files for inline same-origin rendering without a download attribute or Content-Disposition attachment header. When uploads are stored under the public web root, an attacker with access to an affected form can upload HTML through FileField or SVG through ImageField, and JavaScript executes in an authenticated administrator's origin when the file is opened from the backend. Exploitation requires a privilege gap between the uploader and viewer. The issue can expose session or CSRF tokens and enable privilege escalation, but does not permit PHP or PHTML code execution because Symfony guessExtension does not produce those stored extensions. This issue is fixed in version 5.0.13.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/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
EasyCorp EasyAdminBundle >= 5.0.0, < 5.0.13 -

II. Public POCs for CVE-2026-54087

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III. Intelligence Information for CVE-2026-54087

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Patches & Fixes for CVE-2026-54087 (1)

Vendor Advisories for CVE-2026-54087 (1)

Vendor Pages for CVE-2026-54087 (1)

IV. Related Vulnerabilities

Same product: EasyAdminBundle
Same vendor: EasyCorp
Same weakness: CWE-79

V. Comments for CVE-2026-54087

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