Vulnerabilities / Accept PayPal Payments using Contact Form 7 / WPSEC-2026-0643
Accept PayPal Payments using Contact Form 7 <= 4.0.6 - Unauthenticated Missing Authorization to Arbitrary PayPal Refund
Medium 5.3
CWE-862Fixed in 4.0.7
- ID
- WPSEC-2026-0643
- Plugin
- Accept PayPal Payments using Contact Form 7 (contact-form-7-paypal-extension)
- Affected
- from 4.0.0 before 4.0.7
- Remediation
- Update to 4.0.7 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-08
- Attack surface
- Accept PayPal Payments using Contact Form 7 on WPSec AttackSurface
- Fix released
- Published
Description
The Accept PayPal Payments using Contact Form 7 plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the refund AJAX action, which was also registered for unauthenticated users and performed no nonce check or validation that the supplied entry, form and transaction belonged together, in versions 4.0.0 up to, and including, 4.0.6. This makes it possible for unauthenticated attackers to trigger PayPal refunds of transactions using the site's stored PayPal API credentials and mark payment entries as refunded.
References
- https://wpsec.com/vuln/WPSEC-2026-0643/
- https://plugins.svn.wordpress.org/contact-form-7-paypal-extension/tags/4.0.7/
- https://wordpress.org/plugins/contact-form-7-paypal-extension/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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