Overview
CVE-2025-7820 is a high-severity vulnerability affecting the SKT PayPal for WooCommerce plugin for WordPress, versions up to and including 1.4. This vulnerability allows unauthenticated attackers to bypass payment processing and make confirmed purchases without actually paying, potentially leading to significant financial losses for store owners.
Technical Details
The vulnerability stems from the plugin’s reliance on client-side controls for payment processing. Instead of validating payments securely on the server-side, the plugin incorrectly trusts data sent from the client (browser). An attacker can manipulate this client-side data to indicate that a payment has been successfully processed, even if no actual transaction has occurred through PayPal. This allows them to complete the order without making a legitimate payment.
CVSS Analysis
- CVE ID: CVE-2025-7820
- Severity: HIGH
- CVSS Score: 7.5
- This score indicates a significant risk due to the ease of exploitation and the potentially large impact on affected WooCommerce stores.
Possible Impact
Successful exploitation of this vulnerability could result in:
- Financial Loss: Attackers can obtain goods and services without paying, directly impacting revenue.
- Inventory Depletion: Products are removed from inventory without corresponding payment.
- Reputational Damage: Customers may lose trust in the store if they become aware of the vulnerability.
Mitigation and Patch Steps
The recommended course of action is to immediately update the SKT PayPal for WooCommerce plugin to the latest version. If an update isn’t yet available, consider temporarily disabling the plugin until a patched version is released. The developers have addressed this issue, so upgrading is crucial.
Additionally, consider these security best practices:
- Regularly update all WordPress plugins and themes.
- Implement server-side validation for all critical processes, especially payment processing.
- Monitor your store for suspicious activity.
