CVE-2021-24835 in Frontend Manager for WooCommerce Plugin
Summary
by MITRE • 11/08/2021
The WCFM – Frontend Manager for WooCommerce along with Bookings Subscription Listings Compatible WordPress plugin before 6.5.12, when used in combination with another WCFM - WooCommerce Multivendor plugin such as WCFM - WooCommerce Multivendor Marketplace, does not escape the withdrawal_vendor parameter before using it in a SQL statement, allowing low privilege users such as Subscribers to perform SQL injection attacks
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Analysis
by VulDB Data Team • 11/11/2021
The vulnerability identified as CVE-2021-24835 affects the WCFM Frontend Manager for WooCommerce plugin and its Bookings Subscription Listings Compatible extension, specifically versions prior to 6.5.12. This security flaw exists within a WordPress ecosystem where multiple WCFM plugins operate in conjunction, creating a complex environment for vendor management and marketplace operations. The vulnerability manifests when the plugin processes the withdrawal_vendor parameter through a SQL query without proper input sanitization or escaping mechanisms, exposing the system to potential exploitation by unauthorized users.
The technical flaw represents a classic SQL injection vulnerability where the withdrawal_vendor parameter is directly incorporated into database queries without appropriate sanitization. This allows attackers to manipulate the SQL execution flow by injecting malicious SQL code through the parameter. The vulnerability specifically targets the plugin's handling of vendor-related data within the marketplace context, where the withdrawal_vendor parameter likely represents vendor identifiers or account references. The lack of input escaping creates a direct pathway for attackers to execute arbitrary SQL commands against the underlying database, potentially gaining unauthorized access to sensitive vendor information or even modifying database records.
The operational impact of this vulnerability is significant for WordPress sites utilizing the affected WCFM plugin suite, particularly those operating WooCommerce marketplaces with multiple vendor capabilities. Low privilege users such as subscribers who normally would not have database access can exploit this vulnerability to perform unauthorized database operations. This could lead to data breaches, information disclosure of vendor accounts, modification of vendor listings, or even complete compromise of the marketplace functionality. The vulnerability is particularly dangerous in multi-vendor environments where the exposure of vendor data could result in financial losses, reputational damage, or competitive disadvantages. Attackers could potentially extract sensitive information including vendor credentials, transaction details, or customer data stored within the marketplace database.
The vulnerability aligns with CWE-89 which classifies SQL injection as a critical weakness in software applications that process untrusted data in SQL commands. This weakness is further categorized under the ATT&CK framework as part of the SQL Injection technique (T1071.005) and potentially the Credential Access (T1003) and Defense Evasion (T1070) tactics. Organizations using affected plugin versions should immediately implement mitigations including updating to the patched version 6.5.12 or later, which addresses the input sanitization issue. Additional protective measures include implementing proper input validation, using prepared statements for database queries, and restricting database user privileges to minimize potential damage from successful exploitation attempts. Security monitoring should also be enhanced to detect unusual database access patterns that might indicate exploitation attempts against this vulnerability.