CVE-2025-3889: WordPress Simple PayPal Shopping Cart <= 5.1.3 - Insecure Direct Object Reference via 'quantity'
First published: Thu May 01 2025(Updated: )
The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.
Credit: security@wordfence.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Tipsandtricks-hq Wordpress Simple Paypal Shopping Cart | <=5.1.3 | |
| WordPress Simple PayPal Shopping Cart | <=5.1.3 |
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Reference Links
- https://www.wordfence.com/threat-intel/vulnerabilities/id/41212533-535e-4a9e-a9b8-1240021a3752?source=cve
- https://plugins.trac.wordpress.org/browser/wordpress-simple-paypal-shopping-cart/tags/5.1.2/wp_shopping_cart.php#L324
- https://www.tipsandtricks-hq.com/ecommerce/wp-shopping-cart
- https://www.tipsandtricks-hq.com/ecommerce/simple-shopping-cart-enabling-manual-offline-checkout
- https://plugins.trac.wordpress.org/changeset/3284572/
Frequently Asked Questions
What is the severity of CVE-2025-3889?
CVE-2025-3889 has a high severity due to the vulnerability allowing unauthenticated attackers to exploit the lack of validation.
How do I fix CVE-2025-3889?
To fix CVE-2025-3889, update the WordPress Simple Shopping Cart plugin to version 5.1.4 or later.
What versions are affected by CVE-2025-3889?
CVE-2025-3889 affects all versions of WordPress Simple Shopping Cart up to and including 5.1.3.
What type of vulnerability is CVE-2025-3889?
CVE-2025-3889 is classified as an Insecure Direct Object Reference vulnerability.
Can CVE-2025-3889 be exploited remotely?
Yes, CVE-2025-3889 can be exploited remotely by unauthenticated attackers due to insufficient access controls.
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