CVE-2019-15841 in facebook-for-woocommerce Plugin
Summary
by MITRE
The facebook-for-woocommerce plugin before 1.9.15 for WordPress has CSRF via ajax_woo_infobanner_post_click, ajax_woo_infobanner_post_xout, or ajax_fb_toggle_visibility.
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Analysis
by VulDB Data Team • 12/11/2023
The vulnerability identified as CVE-2019-15841 affects the facebook-for-woocommerce plugin version 1.9.14 and earlier within the WordPress ecosystem. This security flaw represents a cross-site request forgery vulnerability that specifically targets three ajax endpoints: ajax_woo_infobanner_post_click, ajax_woo_infobanner_post_xout, and ajax_fb_toggle_visibility. The plugin serves as a bridge between WordPress e-commerce platforms and Facebook's advertising infrastructure, enabling merchants to synchronize their product catalogs and manage Facebook advertising campaigns directly from their WordPress dashboard.
The technical implementation of this CSRF vulnerability stems from the absence of proper anti-forgery token validation within the affected ajax endpoints. When a malicious actor crafts a specially designed web page or email that triggers requests to these endpoints, they can perform unauthorized actions on behalf of authenticated users who visit the malicious content. The vulnerability operates under CWE-352, which categorizes cross-site request forgery as a critical web application security weakness. These specific endpoints handle banner click tracking, x-out functionality for promotional elements, and visibility toggling for Facebook integration features, making them particularly dangerous as they can manipulate user interface elements and potentially alter advertising configurations.
The operational impact of this vulnerability extends beyond simple data manipulation, as it allows attackers to perform actions that could compromise the integrity of Facebook advertising campaigns and potentially lead to financial losses for merchants. An attacker could use this vulnerability to toggle visibility settings on Facebook product feeds, manipulate promotional banner displays, or potentially trigger automated actions that affect ad delivery and campaign performance. The attack vector requires users to be authenticated and browsing the affected WordPress site, making it particularly insidious as it leverages the trust relationship between the user and the website. According to ATT&CK framework, this vulnerability maps to T1566.001 (Phishing: Spearphishing Attachment) and T1203 (Exploitation for Client Execution) as it relies on user interaction with malicious content to execute unauthorized actions.
Mitigation strategies for this vulnerability involve immediate plugin updates to version 1.9.15 or later, which includes proper CSRF token validation mechanisms. Administrators should also implement additional security measures such as monitoring for unusual activity in the plugin's ajax endpoints, ensuring proper authentication checks are in place, and considering the implementation of Content Security Policy headers to limit the execution of unauthorized scripts. The vulnerability demonstrates the critical importance of validating user intent through anti-forgery tokens for all state-changing operations in web applications, particularly in e-commerce plugins that handle sensitive advertising data and financial transactions. Organizations should also conduct regular security assessments of their WordPress plugins to identify and remediate similar vulnerabilities that could compromise their digital advertising infrastructure and customer data integrity.