Missing Authorization Vulnerability in yshop-crm by Yixiang
CVE-2026-109171

5.3MEDIUM

Key Information:

Vendor

Guchengwuyue

Status
Yshop-crm
Vendor
CVE Published:
12 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-109171?

yshop-crm version 2.1.3 contains a vulnerability that allows authenticated back-office users to manipulate contract statuses. Specifically, users can approve or reject contracts via an unprotected endpoint without proper authorization checks, exposing the system to potential abuse. This flaw results from commented-out authorization checks in the CrmContractController, which can lead to unauthorized modifications of customer deal and purchase data. Attackers leveraging this vulnerability could cause significant disruptions in inventory management and customer transactions.

Affected Version(s)

yshop-crm 0 <= 2.1.3

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-2026-109171 - Proof of Concept

References

https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1...
exploit
https://github.com/guchengwuyue/yshop-crm/blob/a77250f7ac...
technical-description
https://github.com/guchengwuyue/yshop-crm/blob/a77250f7ac...
technical-description

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
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

Yaqi Chao
.