CVE-2002-2032 in PHP-Nuke
Summary
by MITRE
sql_layer.php in PHP-Nuke 5.4 and earlier does not restrict access to debugging features, which allows remote attackers to gain SQL query information by setting the sql_debug parameter to (1) index.php and (2) modules.php.
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Analysis
by VulDB Data Team • 08/30/2025
The vulnerability described in CVE-2002-2032 represents a critical security flaw in PHP-Nuke version 5.4 and earlier systems where debugging features are improperly exposed to remote attackers. This issue stems from the sql_layer.php component which fails to implement proper access controls for its debugging functionality, creating an attack vector that allows unauthorized users to manipulate application behavior through specific parameter manipulation.
The technical implementation of this vulnerability occurs through the manipulation of the sql_debug parameter within the application's URL structure. When attackers set this parameter to the value of 1 and target either index.php or modules.php endpoints, they can trigger the execution of debugging code that reveals internal SQL query information. This exposure occurs because the application does not validate whether the requesting user has legitimate authorization to access debugging features, effectively bypassing normal access controls and authentication mechanisms that should protect such sensitive operational data.
From an operational impact perspective, this vulnerability creates significant risks for PHP-Nuke installations as it provides attackers with detailed information about the database structure and query execution patterns. The exposure of SQL query information enables threat actors to perform advanced reconnaissance activities, potentially leading to more sophisticated attacks including SQL injection exploitation, database enumeration, and information disclosure attacks. This information can be leveraged to craft targeted attacks against the underlying database infrastructure and identify potential entry points for further compromise.
The vulnerability aligns with CWE-284 (Improper Access Control) and represents a classic case of insufficient privilege checking within application components. According to ATT&CK framework, this issue maps to T1213 (Data from Information Repositories) and T1566 (Phishing) as attackers can use the exposed information to craft more convincing social engineering attacks or directly exploit database vulnerabilities. The lack of proper input validation and access control measures in the sql_layer.php file demonstrates a fundamental security flaw in the application's defensive architecture.
Mitigation strategies for this vulnerability require immediate implementation of access control restrictions on debugging parameters, proper input validation for all user-supplied parameters, and comprehensive code review to ensure that debugging features are only accessible to authorized administrative users. System administrators should disable debugging features in production environments and implement proper authentication checks before allowing access to any debugging functionality. Additionally, regular security audits should be conducted to identify similar access control weaknesses in other application components, and network segmentation should be implemented to limit exposure of potentially vulnerable applications to untrusted networks.