CVE-2009-2383 in Related-sites
Summary
by MITRE
SQL injection vulnerability in BTE_RW_webajax.php in the Related Sites plugin 2.1 for WordPress allows remote attackers to execute arbitrary SQL commands via the guid parameter.
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Analysis
by VulDB Data Team • 09/16/2025
The vulnerability identified as CVE-2009-2383 represents a critical SQL injection flaw within the Related Sites plugin version 2.1 for WordPress platforms. This issue affects the BTE_RW_webajax.php script which processes user input without proper sanitization, creating an avenue for malicious actors to manipulate database queries through crafted input parameters. The vulnerability specifically targets the guid parameter, which serves as the primary attack vector for executing unauthorized database operations.
The technical implementation of this vulnerability stems from improper input validation and sanitization practices within the WordPress plugin architecture. When the guid parameter is submitted through the webajax.php endpoint, the application fails to adequately filter or escape special characters that could alter the intended SQL query structure. This lack of input sanitization allows attackers to inject malicious SQL code that gets executed within the database context, potentially enabling full database compromise. The vulnerability aligns with CWE-89 which categorizes SQL injection as a fundamental weakness in data validation and input filtering mechanisms.
From an operational perspective, this vulnerability presents significant risks to WordPress installations utilizing the affected plugin version. Remote attackers can leverage this flaw to execute arbitrary SQL commands, potentially leading to data exfiltration, database modification, or complete system compromise. The impact extends beyond simple data theft as attackers might escalate privileges, create backdoor accounts, or manipulate the plugin's functionality to persistently maintain access to the compromised system. The vulnerability's remote exploitability means that attackers do not require local system access or authentication credentials to initiate attacks.
Security professionals should consider this vulnerability in relation to ATT&CK framework techniques such as T1190 for exploitation of remote services and T1078 for valid accounts usage. The attack surface is particularly concerning for WordPress environments where plugins often lack the same security rigor as core applications. Organizations should immediately implement mitigation strategies including plugin updates to versions that address the SQL injection vulnerability, input validation hardening, and database query parameterization. Additionally, implementing web application firewalls and monitoring for suspicious SQL patterns can provide additional layers of defense against exploitation attempts.
The broader implications for WordPress security highlight the importance of thorough third-party plugin security auditing and the necessity of maintaining up-to-date software versions. This vulnerability demonstrates how seemingly minor input validation failures in plugin components can result in catastrophic system compromise, emphasizing the critical need for comprehensive security testing and continuous monitoring of all application components within WordPress environments.