CVE-2025-28876 Overview
CVE-2025-28876 is a Cross-Site Request Forgery (CSRF) vulnerability discovered in the Skrill Official WooCommerce plugin (official-skrill-woocommerce). This plugin provides payment gateway integration between WooCommerce-powered WordPress sites and Skrill, a popular digital wallet and payment processor. The vulnerability allows attackers to perform unauthorized actions on behalf of authenticated administrators by tricking them into visiting malicious web pages.
Critical Impact
Attackers can exploit this CSRF vulnerability to manipulate payment gateway settings, potentially redirecting funds, modifying transaction configurations, or disrupting e-commerce operations on affected WordPress sites.
Affected Products
- Skrill Official WooCommerce Plugin versions up to and including 1.0.66
- WordPress installations running the vulnerable official-skrill-woocommerce plugin
- WooCommerce stores using Skrill as a payment gateway
Discovery Timeline
- 2025-03-11 - CVE-2025-28876 published to NVD
- 2026-04-01 - Last updated in NVD database
Technical Details for CVE-2025-28876
Vulnerability Analysis
This CSRF vulnerability exists due to missing or improper nonce verification in the Skrill Official WooCommerce plugin's administrative functions. When WordPress plugins handle sensitive operations like payment gateway configuration changes, they must implement CSRF protections using WordPress nonces to verify that requests originate from legitimate administrative sessions.
The vulnerability allows an attacker to craft malicious requests that, when executed by an authenticated administrator, can modify plugin settings without proper authorization verification. Since this affects a payment processing plugin, the potential impact includes manipulation of payment configurations, merchant credentials, and transaction handling settings.
Root Cause
The root cause of CVE-2025-28876 is the absence of proper CSRF token validation (WordPress nonces) in one or more administrative endpoints within the Skrill Official plugin. WordPress provides built-in CSRF protection through its nonce system via functions like wp_nonce_field(), wp_verify_nonce(), and check_admin_referer(). When these protections are not implemented, form submissions and AJAX requests become vulnerable to cross-site request forgery attacks.
Attack Vector
The attack is network-based and requires user interaction. An attacker must convince an authenticated WordPress administrator to visit a malicious webpage or click a crafted link while logged into the WordPress dashboard. The malicious page would contain hidden form elements or JavaScript that automatically submits requests to the vulnerable plugin endpoints, leveraging the administrator's active session to perform unauthorized configuration changes.
A typical attack scenario involves:
- Attacker identifies a WordPress site using the vulnerable Skrill Official plugin
- Attacker crafts a malicious HTML page containing hidden forms targeting the plugin's administrative endpoints
- Attacker tricks a site administrator into visiting the malicious page (via phishing, social engineering, or embedding in a compromised site)
- The administrator's browser automatically submits the forged request with their valid session cookies
- The plugin processes the request without verifying CSRF tokens, executing the attacker's malicious payload
Detection Methods for CVE-2025-28876
Indicators of Compromise
- Unexpected changes to Skrill payment gateway configuration in WooCommerce settings
- Unauthorized modifications to merchant credentials or API keys
- Suspicious admin activity logs showing configuration changes without corresponding legitimate login sessions
- Payment processing anomalies or transaction routing changes
Detection Strategies
- Monitor WordPress admin activity logs for configuration changes to the Skrill plugin
- Implement web application firewall (WAF) rules to detect suspicious cross-origin form submissions
- Review access logs for unusual POST requests to wp-admin endpoints related to Skrill settings
- Deploy endpoint detection solutions to identify malicious browser activity patterns
Monitoring Recommendations
- Enable comprehensive WordPress audit logging to track all administrative actions
- Configure alerts for payment gateway configuration modifications
- Monitor for referrer anomalies in requests to administrative plugin endpoints
- Implement real-time monitoring of WooCommerce payment settings changes
How to Mitigate CVE-2025-28876
Immediate Actions Required
- Update the Skrill Official WooCommerce plugin to the latest patched version immediately
- Review recent administrative activity logs for any suspicious configuration changes
- Verify Skrill payment gateway settings have not been tampered with
- Consider temporarily disabling the plugin if an update is not yet available
Patch Information
Organizations should check the Patchstack CSRF Vulnerability Report for the latest information on available patches and update the plugin through the WordPress dashboard or by downloading the fixed version from the official WordPress plugin repository. Ensure the installed version is newer than 1.0.66 to receive the security fix.
Workarounds
- Implement a web application firewall (WAF) with CSRF protection rules while awaiting a patch
- Restrict administrative access to the WordPress dashboard by IP address
- Advise administrators to log out of WordPress before browsing external websites
- Consider using browser isolation or separate browser profiles for WordPress administration
- Enable two-factor authentication on all administrator accounts to add an additional security layer
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
