CVE-2024-1789 in WP SMTP Plugin
Summary
by MITRE • 04/26/2024
The WP SMTP plugin for WordPress is vulnerable to SQL Injection via the 'search' parameter in versions 1.2 to 1.2.6 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
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Analysis
by VulDB Data Team • 05/30/2024
The WP SMTP plugin for WordPress represents a critical security vulnerability identified as CVE-2024-1789, which manifests as a SQL injection flaw affecting versions 1.2 through 1.2.6. This vulnerability resides within the plugin's handling of the 'search' parameter, creating a pathway for malicious actors to manipulate database queries through crafted input. The flaw specifically exploits inadequate input sanitization mechanisms that fail to properly escape user-supplied data before incorporating it into SQL operations. The vulnerability requires authenticated access with administrator-level privileges or higher, making it particularly concerning as it leverages existing administrative access to escalate database exploitation capabilities.
The technical implementation of this vulnerability stems from the plugin's failure to employ proper parameterized queries or adequate input validation when processing the search functionality. According to CWE classification, this represents a CWE-89: Improper Neutralization of Special Elements used in an SQL Command, which directly maps to the core flaw where user input is not properly escaped or parameterized before database execution. The lack of sufficient query preparation means that attackers can append malicious SQL fragments to existing queries, effectively allowing them to manipulate the database structure and extract sensitive information. This vulnerability operates within the ATT&CK framework under T1078 Valid Accounts and T1566 Impairing Defenses, as it requires legitimate administrative credentials but enables data exfiltration through database manipulation.
The operational impact of this vulnerability extends beyond simple information disclosure, as authenticated attackers can leverage the SQL injection to extract database credentials, user information, configuration details, and potentially gain deeper system access. The vulnerability affects the integrity and confidentiality of WordPress installations that rely on the WP SMTP plugin for email functionality, particularly in environments where administrative privileges are compromised. Attackers can construct malicious payloads that bypass normal query restrictions and access restricted database tables containing sensitive data such as user passwords, session tokens, and system configurations. The vulnerability's exploitation requires minimal complexity once administrative access is obtained, making it a particularly attractive target for threat actors seeking persistent access and data extraction.
Mitigation strategies for CVE-2024-1789 focus primarily on immediate plugin updates to versions that address the SQL injection flaw through proper input sanitization and parameterized query implementation. System administrators should conduct comprehensive security audits of all WordPress installations to identify affected versions and ensure prompt patching. Additional defensive measures include implementing strict input validation mechanisms, monitoring database query logs for suspicious activity, and maintaining regular security assessments of WordPress plugins and themes. The vulnerability highlights the importance of proper security practices in plugin development, particularly around user input handling and database query construction, aligning with security standards such as OWASP Top Ten and NIST cybersecurity guidelines for web application security. Organizations should also consider implementing network segmentation and access control measures to limit the potential impact of compromised administrative credentials, while maintaining regular security monitoring to detect anomalous database access patterns that may indicate exploitation attempts.