CVE-2026-102366

mall4j through 4.0 Unrestricted File Upload in Admin File Endpoints

LOW 2.1EPSS 0.2%

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.

Affected: gz-yami · mall4j
CVSS v4.0 VULNCHECK: 2.1 LOWCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 VULNCHECK: 4.4 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.16% chance of exploitation in the next 30 days, 5th percentile
Published: 2026-09-28
Updated: 2026-09-29

Proof-of-concept exploits (1)

LinYuanyi1/cve-request-poc/blob/114b3f0d149e50a7678f591bf8043399fc9ac96c/mall4j/A03_admin…1★ · 2026-09-19

CVE-2026-102366

Proof-of-concept exploits (1)

References