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9.1

Fundiin WooCommerce plugin lets attackers steal payment data

CVE-2026-81649 · published 5 days ago
Summary

The Fundiin plugin for WooCommerce on WordPress (versions up to 3.4.0) does not properly check who is making changes through its API, using the same default password on every site. Because of this, anyone on the internet can view the store’s payment credentials and order information, change the payment settings to redirect funds, and mark unpaid orders as paid. Update the plugin to a newer version or remove it until it is fixed, and review your payment settings for any unauthorized changes.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
unknown fundiin cho woocommerce <= 3.4.0
Original advisory text
Fundiin <= 3.4.0 - Unauthenticated Payment Gateway Settings Update and Credential Disclosure
The Fundiin cho WooCommerce WordPress plugin through 3.4.0 does not have proper authorisation on several of its REST API routes, relying instead on a credential that is identical on every installation, allowing unauthenticated attackers to disclose the store's payment credentials and customer order data, overwrite the payment gateway configuration so that payments are credited elsewhere, and mark unpaid orders as paid. The same missing authorisation also allows arbitrary script to be stored in a field which is output unescaped on the classic checkout, leading to unauthenticated stored XSS on stores that do not use the block-based checkout.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker full control
Severity
9.1 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-863Incorrect Authorization
Timeline
Published11 Oct 2026
Updated15 Oct 2026
First seen11 Oct 2026
Sources
CVE-2026-81649 · NVD
CVE-2026-81649 · MITRE
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