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CVE-2026-102366— mall4j through 4.0 Unrestricted File Upload in Admin File Endpoints

Quick assessment

Affected
gz-yami mall4j
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.

mall4j 版本 4.0 及之前版本在 FileController 端点中存在无限制文件上传漏洞。这些端点缺乏授权检查，并接受未经验证的任意文件类型。拥有任何有效认证令牌的攻击者可以上传 HTML 或 SVG 文件，当从本地存储路径访问这些文件时，将在管理员浏览器中执行恶意脚本，从而导致存储型跨站脚本（Stored XSS）漏洞。

CVSS 4.4 · Medium

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2026-102366

Vulnerability Information
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Vulnerability Title
mall4j through 4.0 Unrestricted File Upload in Admin File Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
mall4j through 4.0 contains an unrestricted file upload vulnerability in FileController endpoints that lack authorization checks and accept arbitrary file types without validation. Attackers with any authenticated token can upload HTML or SVG files that execute scripts in administrator browsers when accessed from the local storage path, resulting in stored cross-site scripting.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
gz-yami mall4j 0 ~ 4.0 -

II. Public POCs for CVE-2026-102366

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III. Intelligence Information for CVE-2026-102366

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Other References for CVE-2026-102366 (5)

Same Patch Batch · gz-yami · 2026-09-28 · 7 CVEs total

CVE-2026-102361 9.1 CRITICAL mall4j through 4.0 Missing Authentication in Password Update Endpoint
CVE-2026-102365 6.5 MEDIUM mall4j through 4.0 Missing Authorization in Admin User Address Endpoints
CVE-2026-102364 5.4 MEDIUM mall4j through 4.0 Improper Authentication Accepts Storefront Tokens on Admin API
CVE-2026-102367 5.4 MEDIUM mall4j through 4.0 Insufficient Session Expiration via Token Refresh
CVE-2026-102362 5.3 MEDIUM mall4j through 4.0 Missing Authentication in Product Review Deletion
CVE-2026-102363 3.7 LOW mall4j through 4.0 Unauthenticated Shipment Tracking Disclosure via Order Number

IV. Related Vulnerabilities

Same product: mall4j
Same vendor: gz-yami
Same weakness: CWE-434

V. Comments for CVE-2026-102366

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