Payment Gateway Vulnerability in OPay for WooCommerce by WordPress
CVE-2026-103319

Currently unrated

Key Information:

Vendor

WordPress
Status
Opay Payment Gateway For WooCommerce
Vendor
CVE Published:
26 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103319?

The OPay Payment Gateway for WooCommerce plugin version 2.5.5 has a security flaw where it fails to validate the origin of payment notifications accurately. This occurs because the secret key utilized for verifying the notifications is empty by default. As a result, this vulnerability permits unauthorized actors to forge authentic notifications, which may lead to the manipulation of order statuses, allowing them to mark transactions as paid, cancelled, or failed without authorization.

Affected Version(s)

OPay Payment Gateway for WooCommerce 0 <= 2.5.5

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-2026-103319 - Proof of Concept

References

https://wpscan.com/vulnerability/c07f15a0-3c15-429f-bcde-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Naoki Kawahigashi
WPScan
.