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CVE-2025-3889 WordPress Simple PayPal Shopping Cart <= 5.1.3 - Insecure Direct Object Reference via 'quantity'

Medium 5.3 Published Updated

Unauthenticated attackers can manipulate product quantities to negative values in Manual Checkout mode, reducing order costs.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2025-3889?

CVE-2025-3889 is a medium-severity vulnerability in mra13 Simple Shopping Cart, published on 1 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-639

Which versions are affected by CVE-2025-3889?

It affects 1 product.

Products include Tipsandtricks-Hq Wordpress Simple Paypal Shopping Cart.

How do I fix CVE-2025-3889?

No fix has been published for CVE-2025-3889 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-3889 being exploited?

There is no known exploitation of CVE-2025-3889 in the wild and no public exploit code.

Sources

Also known as GHSA-cp88-7fch-35v3.

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