Threats Tagged 'cve-2026-9189'
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Threats Tagged 'cve-2026-9189'
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CVE-2026-9189: CWE-345 Insufficient Verification of Data Authenticity in scottpaterson Contact Form 7 – PayPal & Stripe Add-onCVE-2026-9189 0 The Contact Form 7 – PayPal & Stripe Add-on plugin for WordPress is vulnerable to Payment Bypass via Insufficient Verification of Data Authenticity in all versions up to, and including, 2.4.9. Although `cf7pp_paypal_ipn_handler()` correctly validates IPN authenticity by posting back to PayPal with `cmd=_notify-validate`, it fails to compare the IPN payload's `mc_gross` (payment amount), `mc_currency`, or `receiver_email` fields against the corresponding stored order values before passing the attacker-controlled `invoice` field directly to `cf7pp_complete_payment()`, which marks the order completed after only an integer cast with no amount verification. This makes it possible for unauthenticated attackers to mark arbitrary high-value pending orders as fully paid by making a minimal real PayPal payment and crafting an IPN whose `invoice` parameter references the targeted order, effectively completing purchases without tendering the required payment amount. Join the discussion | CVE Database V5 | 05/29/2026, 08:28:24 UTC Added: 05/29/2026, 09:04:09 UTC |
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