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CVE-2025-3530: WordPress Simple PayPal Shopping Cart <= 5.1.2 - Unauthenticated Product Price Manipulation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-23 · updated 2026-06-17
• Weakness: CWE-472

Description

The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to product price manipulation in all versions up to, and including, 5.1.2. This is due to a logic flaw involving the inconsistent use of parameters during the cart addition process. The plugin uses the parameter 'product_tmp_two' for computing a security hash against price tampering while using 'wspsc_product' to display the product, allowing an unauthenticated attacker to substitute details from a cheaper product and bypass payment for a more expensive item.

Affected products

• mra13 Simple Shopping Cart: through 5.1.2

References

• https://plugins.trac.wordpress.org/browser/wordpress-simple-paypal-shopping-cart/tags/5.1.2/wp_shopping_cart.php#L156
• https://plugins.trac.wordpress.org/browser/wordpress-simple-paypal-shopping-cart/tags/5.1.2/wp_shopping_cart.php#L165
• https://plugins.trac.wordpress.org/browser/wordpress-simple-paypal-shopping-cart/tags/5.1.2/wp_shopping_cart.php#L171
• https://plugins.trac.wordpress.org/browser/wordpress-simple-paypal-shopping-cart/tags/5.1.2/wp_shopping_cart.php#L261
• https://plugins.trac.wordpress.org/changeset/3275373/
• https://www.tipsandtricks-hq.com/wordpress-simple-paypal-shopping-cart-plugin-768
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e0a3910b-adc4-4633-a6a1-32ba50894be4?source=cve

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