Webhook Signature Bypass in Paymob for WooCommerce Plugin
CVE-2026-87978

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Paymob For WooCommerce
Vendor
CVE Published:
23 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-87978?

The Paymob for WooCommerce WordPress plugin before version 4.1.14 suffers from a webhook signature verification flaw. This vulnerability enables unauthenticated attackers to exploit the payment processing feature, allowing them to falsely mark WooCommerce orders as paid, potentially resulting in financial losses and unauthorized transaction records for merchants.

Affected Version(s)

Paymob for WooCommerce 0 < 4.1.14

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-2026-87978 - Proof of Concept

References

https://wpscan.com/vulnerability/7eecf65a-3b85-405e-bbe2-...
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

Charles Vosburgh
WPScan
.