CVE-2006-0719 in PHP Classifieds
Summary
by MITRE
SQL injection vulnerability in member_login.php in PHP Classifieds 6.18 through 6.20 allows remote attackers to execute arbitrary SQL commands via the (1) username parameter, which is used by the E-mail address field, and (2) password parameter.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 09/23/2025
The vulnerability identified as CVE-2006-0719 represents a critical SQL injection flaw within the PHP Classifieds software version 6.18 through 6.20. This security weakness specifically targets the member_login.php component, which serves as the primary authentication interface for user access to the classifieds platform. The vulnerability manifests when user input from the email address field and password field is not properly sanitized or validated before being incorporated into database queries. This flaw allows malicious actors to manipulate the underlying database operations through crafted input sequences that bypass normal authentication mechanisms.
The technical execution of this vulnerability occurs through two distinct parameter vectors within the authentication process. Attackers can exploit the username parameter, which corresponds to the email address field, and the password parameter to inject malicious SQL code. When these parameters are processed without adequate input validation or parameterization, the application constructs database queries that concatenate user-supplied data directly into SQL statements. This creates an environment where an attacker can inject additional SQL commands that execute with the privileges of the database user account used by the application. The vulnerability is classified under CWE-89 as SQL injection, which is a well-documented weakness in software applications where untrusted data is directly incorporated into SQL command structures without proper sanitization or parameterization.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete database compromise. Successful exploitation allows attackers to execute arbitrary SQL commands against the backend database, potentially enabling them to extract sensitive user information, modify or delete database records, and gain elevated privileges within the application. The implications are particularly severe for classifieds platforms where user data, including email addresses, personal information, and potentially financial details may be stored. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under the T1190 category for Exploitation of Remote Services and T1071.004 for Application Layer Protocol. The attack surface is broad as the vulnerability affects the core authentication mechanism, making it a prime target for automated exploitation tools and manual attack vectors.
Mitigation strategies for this vulnerability must address both the immediate code-level issues and implement comprehensive security controls. The primary remediation involves implementing proper input validation and parameterized queries throughout the authentication process. All user inputs should be sanitized and validated against expected formats before being processed in database operations. The application should utilize prepared statements or parameterized queries to ensure that user input cannot alter the structure of SQL commands. Additionally, implementing proper access controls and database privilege management ensures that even if exploitation occurs, the impact is limited. Security measures should include input length restrictions, character set validation, and regular security auditing of database interactions. Organizations using PHP Classifieds versions 6.18 through 6.20 should immediately upgrade to patched versions or implement compensating controls to prevent exploitation. The vulnerability demonstrates the critical importance of proper input handling and database security practices that align with industry standards such as OWASP Top Ten and NIST Cybersecurity Framework recommendations for preventing injection attacks.