Payment Gateway Vulnerability in Visma Pay for WooCommerce Plugin
CVE-2026-103308

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
Visma Pay For WooCommerce
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103308?

The Visma Pay for WooCommerce plugin prior to version 1.2.2 is susceptible to an improper authentication vulnerability. This flaw allows attackers to bypass verification of payment gateway return requests due to the lack of a merchant secret when credentials are not set. As a result, malicious actors can falsely mark any order as paid, while also potentially disclosing sensitive customer data, including names, email addresses, and postal addresses. Store owners using this plugin should upgrade to the latest version immediately to mitigate this security risk.

Affected Version(s)

Visma Pay for WooCommerce 0 < 1.2.2

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-2026-103308 - Proof of Concept

References

https://wpscan.com/vulnerability/26bae5f0-510b-403e-bd69-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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
.