CVE-2025-8198: MinimogWP WordPress Theme Price Manipulation

CVE-2025-8198 Overview

CVE-2025-8198 is a price manipulation vulnerability affecting the MinimogWP – The High Converting eCommerce WordPress Theme for WordPress. The vulnerability exists in all versions up to, and including, 3.9.0 due to insufficient validation of quantity values when modifying cart quantities. This business logic flaw allows unauthenticated attackers to manipulate product prices by adding items to the cart and adjusting quantities to fractional amounts, which causes the price calculation to behave unexpectedly.

Critical Impact
Unauthenticated attackers can exploit this vulnerability to purchase items at manipulated prices by submitting fractional quantity values, potentially causing significant financial losses for e-commerce businesses using the affected theme.

Affected Products

MinimogWP WordPress Theme versions up to and including 3.9.0
WordPress installations using MinimogWP with WooCommerce versions prior to 9.8.2
E-commerce sites running vulnerable configurations of MinimogWP theme

Discovery Timeline

2025-07-26 - CVE-2025-8198 published to NVD
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-8198

Vulnerability Analysis

This vulnerability is classified under CWE-472 (External Control of Assumed-Immutable Web Parameter). The MinimogWP theme fails to properly validate and sanitize quantity input values when users modify cart quantities through the e-commerce interface. The application assumes that quantity values will be whole integers, but does not enforce this assumption on the server side.

When a fractional quantity value is submitted (e.g., 0.01 instead of 1), the price calculation logic processes this value without proper validation, resulting in incorrect price computations. This allows attackers to effectively reduce the total cost of items in their shopping cart to a fraction of the intended price.

The vulnerability is network-accessible and requires no authentication or user interaction to exploit, making it particularly dangerous for public-facing e-commerce websites.

Root Cause

The root cause of this vulnerability lies in the inadequate input validation within the cart quantity handling mechanism of the MinimogWP theme. The application fails to enforce integer constraints on quantity parameters, allowing floating-point values to be processed by the price calculation engine. This represents a classic business logic flaw where the application trusts user-supplied input without proper server-side validation.

Attack Vector

The attack is executed over the network without requiring any authentication or special privileges. An attacker can exploit this vulnerability by:

Adding products to the shopping cart on a vulnerable WordPress site using MinimogWP theme
Intercepting or modifying the cart update request
Changing the quantity parameter to a fractional value (e.g., 0.001)
Submitting the modified request to the server
Completing the checkout process with the manipulated price

The vulnerability mechanism involves intercepting cart quantity update requests and substituting integer values with fractional amounts. When the server processes these fractional quantities, the price calculation multiplies the unit price by the fractional quantity, resulting in significantly reduced totals. For detailed technical analysis, refer to the Wordfence Vulnerability Analysis.

Detection Methods for CVE-2025-8198

Indicators of Compromise

Cart update requests containing non-integer or fractional quantity values in HTTP POST/GET parameters
Orders with unusual pricing that doesn't match expected product costs
Transaction logs showing items purchased at prices inconsistent with catalog pricing
Unusual patterns of small-value transactions or orders with fractional quantities

Detection Strategies

Implement web application firewall (WAF) rules to detect and block requests containing fractional values in quantity parameters
Monitor WooCommerce transaction logs for orders with pricing anomalies or unexpected total calculations
Review server access logs for suspicious cart manipulation patterns, particularly repeated cart updates with varying quantity formats
Deploy application-level logging to capture and alert on non-integer quantity submissions

Monitoring Recommendations

Enable detailed logging for all cart update and checkout operations in WooCommerce
Set up alerts for orders where the calculated total deviates from expected pricing based on product catalog
Monitor for high volumes of cart modifications from single IP addresses or user sessions
Implement real-time transaction monitoring to flag orders with suspiciously low totals

How to Mitigate CVE-2025-8198

Immediate Actions Required

Update MinimogWP theme to a version newer than 3.9.0 that includes the security fix
Upgrade WooCommerce to version 9.8.2 or later, which mitigates this vulnerability regardless of theme version
Audit recent orders for potential exploitation by reviewing orders with unusual pricing patterns
Implement server-side input validation to enforce integer-only quantity values as an additional safeguard

Patch Information

The vulnerability has been addressed by the theme developer. Users should update to the latest version of MinimogWP available through the Theme Move Changelog. Additionally, WooCommerce version 9.8.2 and later include protections that prevent exploitation of this vulnerability, providing an alternative mitigation path.

Workarounds

Upgrade WooCommerce to version 9.8.2 or later as an immediate mitigation if theme updates cannot be applied quickly
Implement custom server-side validation in functions.php to sanitize and validate cart quantity inputs as integers
Deploy WAF rules to block requests containing fractional values in cart quantity parameters
Consider temporarily disabling the cart functionality until patches can be applied for high-risk deployments

bash

# WordPress/WooCommerce update commands via WP-CLI
wp theme update minimogwp
wp plugin update woocommerce --version=9.8.2
wp cache flush