CVE-2006-5491 in UltraCMS
Summary
by MITRE
Multiple SQL injection vulnerabilities in include/index.php in UltraCMS 0.9 allow remote attackers to execute arbitrary SQL commands via the (1) username or (2) password parameters.
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Analysis
by VulDB Data Team • 04/25/2026
The vulnerability identified as CVE-2006-5491 represents a critical security flaw in UltraCMS version 0.9, specifically within the include/index.php file. This issue manifests as multiple SQL injection vulnerabilities that arise from inadequate input validation and sanitization of user-provided data. The vulnerability affects two primary parameters namely username and password, which are processed without proper security measures that would normally prevent malicious SQL code execution. The flaw stems from the application's failure to properly escape or filter special characters that could alter the intended SQL query structure, creating an avenue for unauthorized database access and manipulation.
From a technical perspective, this vulnerability operates under the Common Weakness Enumeration CWE-89 category, which specifically addresses SQL injection flaws where untrusted data is incorporated into SQL commands without proper sanitization. The attack vector is particularly dangerous because it allows remote exploitation without requiring authentication or privileged access to the system. When attackers submit malicious input through the username or password parameters, the application processes these values directly within SQL queries without proper parameterization or input validation. This creates opportunities for attackers to manipulate database queries to extract sensitive information, modify data, or even execute administrative commands on the underlying database system.
The operational impact of this vulnerability extends beyond simple data theft, encompassing potential complete system compromise and data integrity breaches. Attackers can leverage this flaw to bypass authentication mechanisms, access confidential user information, modify or delete database records, and potentially escalate privileges within the application environment. The remote nature of the exploit means that attackers can target the vulnerability from anywhere on the internet, making it particularly dangerous for publicly accessible web applications. Organizations running UltraCMS 0.9 are at significant risk of unauthorized access to their databases, which could lead to data breaches, service disruption, and compliance violations that may result in regulatory penalties and reputational damage.
Effective mitigation strategies for this vulnerability require immediate implementation of proper input validation and parameterized queries throughout the application codebase. The most critical remediation involves implementing proper SQL parameterization techniques that separate user input from SQL command structures, thereby preventing malicious code injection. Additionally, organizations should deploy web application firewalls that can detect and block suspicious SQL injection patterns, implement strict input filtering and sanitization routines, and ensure all user-supplied data undergoes comprehensive validation before processing. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities within the application architecture, while maintaining up-to-date security patches and following secure coding practices that align with industry standards such as those recommended by the Open Web Application Security Project. The vulnerability also highlights the importance of implementing proper access controls and database security measures, including least privilege principles for database accounts and regular monitoring of database activities to detect anomalous behavior that may indicate exploitation attempts.