CVE-2026-66625 in WC Vendors Marketplace Plugin
Summary
by MITRE • 09/17/2026
Administrator SQL Injection in WC Vendors Marketplace <= 2.7.2.1 versions.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 09/17/2026
The vulnerability identified as an administrator-level SQL injection flaw within the WC Vendors Marketplace plugin for WordPress, affecting version 2.7.2.1 and earlier releases, represents a critical security risk that compromises the integrity of the underlying database infrastructure. This specific weakness arises from insufficient sanitization and validation of user-supplied input parameters before they are incorporated into dynamic SQL queries executed by the application backend. In typical web applications utilizing WordPress architecture, administrative functions often handle sensitive data such as vendor configurations, payment settings, and marketplace rules. When these inputs are not properly escaped or parameterized, an attacker can inject malicious SQL code that alters the intended logic of the database query. This flaw is particularly severe because it requires administrator-level privileges to exploit in many contexts, yet if authentication mechanisms are bypassed or credentials are compromised through other vectors such as brute force attacks or credential stuffing, the impact becomes catastrophic.
From a technical perspective, this vulnerability aligns with Common Weakness Enumeration (CWE) identifier CWE-89, which describes Improper Neutralization of Special Elements used in an SQL Command. The root cause lies in the failure to use prepared statements or parameterized queries when interacting with the MySQL database engine associated with WordPress installations. Instead, the application likely concatenates user input directly into SQL strings, allowing special characters like single quotes and semicolons to terminate existing commands and append new ones. This manipulation can lead to unauthorized data retrieval, modification of critical records, or even complete deletion of tables depending on the privileges granted to the database user account running the web server process. The presence of such a flaw indicates a lack of adherence to secure coding practices regarding input validation at both the client-side and server-side levels.
The operational impact of this vulnerability extends beyond simple data theft. An attacker with administrative access who exploits this SQL injection can potentially extract sensitive information including user credentials, payment gateway keys, vendor personal identifiable information, and transaction histories stored in the WordPress database. Furthermore, depending on the configuration of the MySQL instance, such as if it has FILE privileges enabled, an attacker might attempt to write files to the server's file system or execute operating system commands through specific SQL functions like LOAD_FILE or INTO OUTFILE. This could lead to full server compromise, allowing the installation of web shells for persistent access and further lateral movement within the network infrastructure. The integrity of the marketplace is severely undermined as attackers can manipulate vendor listings, alter commission structures, or disrupt service availability by corrupting database entries.
This vulnerability maps directly to several techniques in the MITRE ATT&CK framework, specifically T1059 which covers Command and Scripting Interpreter activities via SQL commands, and potentially T1078 if combined with valid credential theft for initial access. The exploitation path typically involves identifying an administrative endpoint that accepts input parameters related to vendor management or marketplace settings. By injecting payloads designed to extract data using UNION SELECT statements or blind boolean-based inference techniques, the attacker can systematically enumerate database contents without triggering immediate detection mechanisms in standard web application firewalls if the payload is carefully crafted to evade signature-based rules. The lack of proper error handling often aids attackers by providing feedback that confirms successful injection attempts through distinct HTTP responses or time delays caused by complex queries.
Mitigation strategies must prioritize immediate patching and robust input validation practices. Administrators running WC Vendors Marketplace versions 2.7.2.1 or older should upgrade to the latest patched version released by the vendor, which presumably implements proper parameterized queries and enhanced input sanitization routines. In cases where upgrading is not immediately feasible due to compatibility constraints with other plugins or custom code modifications, temporary mitigations include implementing a Web Application Firewall (WAF) rule set specifically tuned to detect SQL injection patterns in administrative endpoints. Additionally, enforcing strict role-based access control ensures that only trusted users can interact with vulnerable functions, and enabling multi-factor authentication reduces the risk of credential compromise leading to exploitation. Database-level hardening should also be reviewed, ensuring that the database user account used by WordPress has minimal privileges necessary for operation, thereby limiting the potential damage if an injection is successful. Regular security audits and code reviews focusing on SQL query construction are essential preventive measures against such vulnerabilities in future development cycles.