CVE-2026-88764: Improper Privilege Management

The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged...

WordPress WP Hotel Booking plugin < 2.3.2 - Unauthenticated PayPal Payment Bypass vulnerability

Unauthenticated PayPal Payment Bypass vulnerability discovered by Muni Nitish Kumar Yaddala in WordPress Plugin WP Hotel Booking versions 2.3.2...

CVE-2026-14936

The CVE concerns the Simple Membership WordPress plugin prior to version 4.7.7, where PayPal IPN verification is not performed against the site’s configured merchant account before activating a membership. This allows unauthenticated users to activate or extend memberships using PayPal payments t...

CVE-2026-14936 Simple Membership < 4.7.7 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verification

The Simple Membership WordPress plugin before 4.7.7 does not verify that a PayPal payment notification was sent to the site's own configured merchant account before activating a membership, allowing unauthenticated users to activate or extend a membership using a payment made to an arbitrary PayP...

CVE-2026-12501

CVE-2026-12501 affects the WP Travel Engine plugin for WordPress, prior to version 6.8.2. The vulnerability arises because the plugin does not verify that an incoming PayPal IPN is sent to the site’s merchant account, nor that the paid amount matches the order total, before marking a booking as p...

CVE-2026-12501 WP Travel Engine < 6.8.2 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver and Amount Verification

The WP Travel Engine WordPress plugin before 6.8.2 does not verify that an incoming PayPal payment notification was sent to the site's configured merchant account, nor that the paid amount matches the order total, before marking a booking as paid, allowing unauthenticated attackers to mark bookin...

CVE-2026-15152

The vulnerability affects WP Hotel Booking plugin for WordPress prior to 2.3.2. It allows unauthenticated users to mark bookings as fully paid without actual payment: the plugin fails to verify that a PayPal payment notification corresponds to a payment to the site’s merchant account and that the...

CVE-2026-11361 Formidable Forms < 6.32.1 - Unauthenticated Payment Bypass via PayPal APPROVAL_PENDING Subscription Status

The Formidable Forms WordPress plugin before 6.32.1 does not properly validate the status of a PayPal subscription payment before marking it complete, allowing unauthenticated users to bypass payment and trigger paid form actions — such as digital content access, license delivery, and membership...

CVE-2026-12501: Insufficient Verification of Data Authenticity

The WP Travel Engine WordPress plugin before 6.8.2 does not verify that an incoming PayPal payment notification was sent to the site's configured merchant account, nor that the paid amount matches the order total, before marking a booking as paid, allowing unauthenticated attackers to mark bookin...

CVE-2026-10782 RealHomes Memberships <= 3.0.9 - Missing Authorization to Authenticated (Subscriber+) Membership Payment Bypass via 'ims_add_paypal_recurring_membership' AJAX Action

The RealHomes Memberships plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.0.9. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with...

CVE-2026-13143 WP Travel < 11.8.1 - Unauthenticated Payment Bypass via Forged PayPal IPN

The WP Travel WordPress plugin before 11.8.1 does not verify PayPal Instant Payment Notifications through the PayPal post-back handshake before marking a booking paid, allowing unauthenticated attackers to forge a notification that flips an arbitrary pending booking to a paid and booked state at ...

CVE-2026-12688

The ProfileGrid WordPress plugin before 5.9.9.7 does not verify PayPal IPN notifications before granting paid group membership, allowing unauthenticated attackers to forge a payment notification and mark any user as a paid member of any group without any payment being made...

EUVD-2026-48199

Unauthenticated Broken Access Control in Payment Gateway for PayPal on WooCommerce = 9.1.4 versions...

CVE-2026-15502

A vulnerability was detected in AojiaoZero Antaris 1.0. This affects the function rewardPurchase of the file /ipn.php of the component PayPal IPN Payment Handler. The manipulation of the argument itemnumber results in sql injection. The attack may be performed from remote. The vendor was contacte...

CVE-2026-43928

FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, the PayPalEmail payment adapter accepts PayPal IPN callbacks and credits the IPN-supplied amount mcgross to the client's balance without validating it against the invoice total. Combined with a $0.05...

EUVD-2026-39949

The RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login plugin for WordPress is vulnerable to Authentication Bypass via Insufficient Verification of Data Authenticity in all versions up to and including 6.0.8.6. This is due to the PayPal IPN callback handler...

EUVD-2026-33265

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 cf7pppaypalipnhandler correctly validates IPN authenticity by posting back to PayPal with...

GHSA-MMW7-WQ3C-WF9P WWBN AVideo Affected by a PayPal IPN Replay Attack Enabling Wallet Balance Inflation via Missing Transaction Deduplication in ipn.php

Summary The PayPal IPN v1 handler at plugin/PayPalYPT/ipn.php lacks transaction deduplication, allowing an attacker to replay a single legitimate IPN notification to repeatedly inflate their wallet balance and renew subscriptions. The newer ipnV2.php and webhook.php handlers correctly deduplicate...

CVE-2026-39366

WWBN AVideo is an open source video platform. In versions 26.0 and prior, the PayPal IPN v1 handler at plugin/PayPalYPT/ipn.php lacks transaction deduplication, allowing an attacker to replay a single legitimate IPN notification to repeatedly inflate their wallet balance and renew subscriptions...

CVE-2025-14444

The RegistrationMagic – Custom Registration Forms, User Registration, Payment, and User Login plugin for WordPress is vulnerable to payment bypass due to insufficient verification of data authenticity on the 'processpaypalsdkpayment' function in all versions up to, and including, 6.0.6.9. This is...