Improper Input Validation in Eurobank WooCommerce Payment Gateway Plugin
CVE-2026-103300

5.3MEDIUM

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103300?

The Eurobank WooCommerce Payment Gateway plugin for WordPress, up to version 2.1.1, is vulnerable due to a failure to validate payment-confirmation requests properly. The plugin does not confirm that incoming requests genuinely originate from the payment provider and comes with an uninitialized authentication secret by default. This critical oversight allows unauthenticated attackers to falsely mark any pending order as paid or change the status of any order to failed, posing a significant security risk to online transactions.

Affected Version(s)

Eurobank WooCommerce Payment Gateway 0 <= 2.1.1

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-2026-103300 - Proof of Concept

References

https://wpscan.com/vulnerability/37851403-0765-4fc2-80f6-...
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
.