Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
No advisories yet.
Fri, 29 May 2026 16:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Scottpaterson
Scottpaterson contact Form 7 – Paypal & Stripe Add-on Wordpress Wordpress wordpress |
|
| Vendors & Products |
Scottpaterson
Scottpaterson contact Form 7 – Paypal & Stripe Add-on Wordpress Wordpress wordpress |
Fri, 29 May 2026 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 29 May 2026 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Contact Form 7 – PayPal & Stripe Add-on <= 2.4.9 - Unauthenticated Payment Bypass via Insufficient Verification of Data Authenticity via PayPal IPN Handler ('invoice'/'mc_gross' Verification) | |
| Weaknesses | CWE-345 | |
| References |
|
|
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: Wordfence
Published:
Updated: 2026-05-29T10:04:53.551Z
Reserved: 2026-05-21T15:06:53.761Z
Link: CVE-2026-9189
Updated: 2026-05-29T10:04:47.955Z
Status : Deferred
Published: 2026-05-29T09:16:18.560
Modified: 2026-05-29T13:09:05.450
Link: CVE-2026-9189
No data.
OpenCVE Enrichment
Updated: 2026-05-29T15:47:21Z