CVE-2026-102366CWE-434unrestricted-file-upload

CVE-2026-102366

Medium · published September 29, 2026

CVSS v3.1
4.4
EPSS
0%
Percentile
5.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
2.1 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00163 · 5.2th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-09-29T04:17Z
References (5)
https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A03_admin_file_upload_xss.py · [email protected]https://github.com/gz-yami/mall4j · [email protected]https://github.com/gz-yami/mall4j/blob/ffc672fc1aa4320ce02d0b93853bb456ae0a4dae/yami-shop-admin/src/main/java/com/yami/shop/admin/controller/FileController.java#L44-L64 · [email protected]https://github.com/gz-yami/mall4j/blob/ffc672fc1aa4320ce02d0b93853bb456ae0a4dae/yami-shop-service/src/main/java/com/yami/shop/service/impl/AttachFileServiceImpl.java#L62-L81 · [email protected]https://www.vulncheck.com/advisories/mall4j-through-4.0-unrestricted-file-upload-in-admin-file-endpoints · [email protected]
EPSS history
Timeline
  • 30 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 28 SEP 23:34Z
    mall4j through 4.0 Unrestricted File Upload in Admin File Endpoints
    cvelistv5