Race Condition in YITH WooCommerce Gift Cards Plugin

Executive Summary

This vulnerability is a race condition in the YITH WooCommerce Gift Cards plugin before version 4.38.1. It allows attackers to spend more than a gift card's balance by submitting multiple simultaneous checkouts for the same code without proper balance locking or atomic updates.

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Detection Guidance

To detect this vulnerability, check if your YITH WooCommerce Gift Cards plugin version is below 4.38.1. You can use WordPress commands like 'wp plugin list' or inspect the plugin files for version details. Monitor for unusual gift card balance deductions or multiple simultaneous redemptions.

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Impact Analysis

If you use the affected plugin versions, attackers could exploit this to redeem gift cards for more value than intended, leading to financial losses for your business or customers. Unauthenticated attackers can double-spend gift card balances.

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Mitigation Strategies

Immediately update the YITH WooCommerce Gift Cards plugin to version 4.38.1 or later. Disable gift card redemptions temporarily if an update is not possible. Review transaction logs for suspicious activity and restrict unauthenticated access to checkout processes.

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