Unauthenticated Payment Notification Forgery in Sadad QA Payment Plugin for WordPress
CVE-2026-103330

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Sadad Qa Payment
Vendor
CVE Published:
28 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103330?

The Sadad QA Payment Plugin for WordPress, up to version 1.28, has a serious flaw in its payment notification handling. The plugin fails to properly verify the authenticity of incoming payment notifications due to the insecure handling of the merchant secret, which is left empty by default. This allows attackers to manipulate signed data and forge valid payment confirmations, enabling them to mark orders as paid without actual transactions taking place. Users of this plugin are at risk of significant financial losses unless they patch this vulnerability.

Affected Version(s)

Sadad QA Payment 1.28

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-2026-103330 - Proof of Concept

References

https://wpscan.com/vulnerability/0681f5a8-a1cd-44b0-b7c8-...
exploitvdb-entrytechnical-description

CVSS V3.1

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

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Naoki Kawahigashi
WPScan
.