Authorization Bypass in Mall4j User Address Controller
CVE-2026-102365

7.1HIGH

Key Information:

Vendor

Gz-yami

Status
Mall4j
Vendor
CVE Published:
28 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-102365?

The Mall4j application, specifically versions through 4.0, suffers from a lack of proper authorization checks in the UserAddrController. This oversight allows authenticated attackers to access sensitive customer address data via the /user/addr/page and /user/addr/info endpoints. As a result, attackers can potentially gather comprehensive information, including names, phone numbers, and postal addresses of customers, thereby posing significant privacy risks. Organizations using Mall4j should assess their systems for this vulnerability and implement immediate remediation measures.

Affected Version(s)

mall4j 0 <= 4.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-102365 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/114b3f...
exploit
https://github.com/gz-yami/mall4j
product
https://github.com/gz-yami/mall4j/blob/ffc672fc1aa4320ce0...
technical-description

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mingsheng Lin
.