CVE-2006-2034 in FlexBB
Summary
by MITRE
SQL injection vulnerability in function/showprofile.php in FlexBB 0.5.5 allows remote attackers to execute arbitrary SQL commands, and view all usernames and passwords, via the id parameter to the showprofile page in index.php.
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Analysis
by VulDB Data Team • 10/25/2025
The vulnerability identified as CVE-2006-2034 represents a critical SQL injection flaw within the FlexBB 0.5.5 bulletin board system, specifically targeting the function/showprofile.php component. This security weakness arises from inadequate input validation and sanitization mechanisms that fail to properly filter user-supplied data before incorporating it into database queries. The vulnerability manifests when the id parameter is passed through the index.php file to the showprofile page, creating an exploitable path for malicious actors to manipulate the underlying database operations.
The technical nature of this flaw aligns with CWE-89, which categorizes SQL injection vulnerabilities as weaknesses in software that allows attackers to execute unauthorized SQL commands against the database. The vulnerability occurs because the application directly concatenates user input into SQL query strings without proper parameterization or input sanitization. When an attacker supplies a malicious value through the id parameter, the application processes this input without adequate validation, allowing the attacker to inject additional SQL commands that bypass normal authentication and authorization mechanisms.
The operational impact of this vulnerability is severe and multifaceted, as it provides remote attackers with complete database access capabilities. Successful exploitation enables attackers to execute arbitrary SQL commands, which can result in data exfiltration, modification, or deletion of critical system information. The vulnerability specifically allows attackers to view all usernames and passwords stored within the database, potentially compromising the entire user base of the bulletin board system. This exposure creates cascading security risks where compromised credentials can be used for further attacks within the network infrastructure or for identity theft purposes.
The attack vector for this vulnerability follows the techniques described in the MITRE ATT&CK framework under the T1190 category, which covers exploitation of vulnerabilities in remote services. Attackers can leverage this vulnerability through simple web-based requests without requiring special privileges or complex attack chains. The vulnerability's accessibility makes it particularly dangerous as it can be exploited by automated scanning tools, significantly increasing the attack surface and potential impact. Organizations using FlexBB 0.5.5 are exposed to immediate risk of data breaches and unauthorized system access.
Mitigation strategies for this vulnerability should include immediate implementation of parameterized queries and input validation mechanisms to prevent SQL injection attacks. The recommended approach involves updating the application code to use prepared statements with proper parameter binding, which eliminates the possibility of SQL command injection by separating the SQL code structure from the data. Additionally, implementing proper access controls and authentication mechanisms, along with regular security audits and input sanitization, would significantly reduce the risk of exploitation. System administrators should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious database access patterns and prevent unauthorized data access attempts.