Authorization Bypass Vulnerability in Sanluan PublicCMS
CVE-2026-121583

5.3MEDIUM

Key Information:

Vendor

Sanluan

Status
Publiccms
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121583?

A vulnerability exists in Sanluan PublicCMS version 5 within the TradePaymentService, specifically in the pendingRefund function. This vulnerability allows attackers to manipulate the userId argument, which can lead to unauthorized access. The potential for remote exploitation makes this an urgent issue. This web application security flaw was addressed in the 202608 series, where the problematic payment controller was removed (commit 7329437). It is essential for users of this product to implement necessary security measures.

Affected Version(s)

PublicCMS 5

References

https://vuldb.com/vuln/430428
vdb-entrytechnical-description
https://vuldb.com/vuln/430428/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121583
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

s1mple_xy (VulDB User)
VulDB Vulnerability Moderation Team
.