CVE-2025-3874 – The WordPress Simple Shopping Cart plugin has a... (How to Fix)

📋 TL;DR

The WordPress Simple Shopping Cart plugin has an Insecure Direct Object Reference vulnerability that allows unauthenticated attackers to access and manipulate customer shopping carts. Attackers can edit product links, add/delete products, and discover coupon codes. All WordPress sites using this plugin up to version 5.1.3 are affected.

💻 Affected Systems

Products:

WordPress Simple Shopping Cart plugin

Versions: All versions up to and including 5.1.3

Operating Systems: All

Default Config Vulnerable: ⚠️ Yes

Notes: Any WordPress site with this plugin enabled is vulnerable regardless of configuration.

📦 What is this software?

Wordpress Simple Paypal Shopping Cart by Tipsandtricks Hq

View all CVEs affecting Wordpress Simple Paypal Shopping Cart →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could manipulate shopping carts to redirect payments, steal coupon codes, or delete products, potentially causing financial loss and business disruption.

🟠

Likely Case

Unauthenticated attackers accessing and modifying shopping carts, potentially altering prices or redirecting purchases.

🟢

If Mitigated

Limited impact with proper monitoring and quick patching, though some cart manipulation may still occur before detection.

🌐 Internet-Facing: HIGH

🏢 Internal Only: LOW

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

The vulnerability stems from predictable cart identifiers that can be easily enumerated.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 5.1.4 or later

Vendor Advisory: https://wordpress.org/plugins/wordpress-simple-paypal-shopping-cart/#developers

Restart Required: No

Instructions:

1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'WordPress Simple Shopping Cart'
4. Click 'Update Now' if available
5. If no update appears, manually download version 5.1.4+ from WordPress.org

🔧 Temporary Workarounds

Disable plugin

all

Temporarily disable the vulnerable plugin until patched

wp plugin deactivate wordpress-simple-paypal-shopping-cart

🧯 If You Can't Patch

Implement web application firewall rules to block suspicious cart manipulation requests
Monitor access logs for unusual patterns of cart ID enumeration

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Installed Plugins for 'WordPress Simple Shopping Cart' version

Check Version:

wp plugin get wordpress-simple-paypal-shopping-cart --field=version

Verify Fix Applied:

Confirm plugin version is 5.1.4 or higher in WordPress admin panel

📡 Detection & Monitoring

Log Indicators:

Multiple sequential cart ID requests from single IP
Unauthenticated requests to cart manipulation endpoints

Network Indicators:

HTTP requests with predictable cart ID patterns
Unusual spikes in cart-related API calls

SIEM Query:

source="wordpress.log" AND ("cart" OR "wpsc") AND status=200 AND user="-" | stats count by src_ip

📊 Metadata

CVE ID: CVE-2025-3874

CVSS v3 Score: 6.5 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE: CWE-639

EPSS Score: 0.37% exploit probability (58.3th percentile)

Published: May 1, 2025

Last Updated: May 6, 2025

🔗 References

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