Authorization Bypass in yshop-crm Allows Unauthorized Messaging
CVE-2026-92455

5.3MEDIUM

Key Information:

Vendor

Guchengwuyue

Status
Yshop-crm
Vendor
CVE Published:
16 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-92455?

The yshop-crm application version 2.1.3 contains a vulnerability that fails to enforce proper authorization controls on the sendSms and sendMail API endpoints within the CrmCustomerController. This oversight allows any authenticated back-office user to send SMS and email communications to arbitrary customer accounts by simply invoking the respective API calls. Attackers can channel unauthorized messages using HTTP POST requests to /admin-api/crm/customer/send-sms and /admin-api/crm/customer/send-mail, providing unverified customer IDs and payload parameters. This gap could lead to misuse of the organization's communication systems, potentially harming customer trust and privacy.

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-2026-92455 - Proof of Concept

CVE-2026-92455 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/master...
exploit
https://github.com/LinYuanyi1/cve-request-poc/blob/master...
exploit
https://github.com/guchengwuyue/yshop-crm/blob/5f5810a0e1...
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

Mingsheng Lin (lincoke)
.