CVE-2006-5597 in Web Forum File Sharing Sever Powerpack
Summary
by MITRE
join.asp in MiniHTTP Web Forum & File Server PowerPack 4.0 allows remote attackers to add or modify arbitrary user accounts via modified (1) frmMailBox and (2) frmUserPass parameters.
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Analysis
by VulDB Data Team • 04/25/2026
The vulnerability described in CVE-2006-5597 represents a critical authentication bypass flaw within the MiniHTTP Web Forum & File Server PowerPack 4.0 software. This issue resides in the join.asp component which handles user registration and account management functions. The vulnerability stems from inadequate input validation and insufficient access controls that permit remote attackers to manipulate specific parameters during the user account creation or modification process. Attackers can exploit this weakness by crafting malicious requests that modify the frmMailBox and frmUserPass parameters, effectively allowing unauthorized account manipulation without proper authentication.
The technical implementation of this vulnerability demonstrates a classic case of insecure parameter handling and privilege escalation. The join.asp script fails to validate the integrity of user-supplied parameters before processing them, creating an opportunity for attackers to inject malicious data into the system. When the application processes the frmMailBox parameter, it accepts email addresses that may not conform to expected formats or security policies, while the frmUserPass parameter allows attackers to set arbitrary passwords for user accounts. This flaw operates at the application layer and can be exploited through web-based attacks without requiring any local system access or elevated privileges.
The operational impact of this vulnerability extends beyond simple account manipulation to encompass potential system compromise and data integrity violations. An attacker who successfully exploits this vulnerability can create administrative accounts, modify existing user credentials, or establish persistent access points within the web server environment. The implications include unauthorized data access, potential denial of service conditions, and the ability to escalate privileges within the application's user management system. This vulnerability directly violates security principles of least privilege and input validation, creating an attack surface that could lead to complete system compromise if the web server has elevated permissions or if the application stores sensitive data.
Mitigation strategies for this vulnerability should focus on implementing robust input validation, parameter sanitization, and access control mechanisms. Organizations should immediately apply vendor patches or updates if available, while implementing additional security controls such as web application firewalls to monitor and filter suspicious parameter values. The implementation of proper authentication checks and session management controls would prevent unauthorized modifications to user accounts. This vulnerability aligns with CWE-20: Improper Input Validation and CWE-285: Improper Authorization, and maps to ATT&CK technique T1078.004: Valid Accounts to maintain persistent access within compromised systems. Security teams should also implement regular vulnerability assessments and penetration testing to identify similar parameter manipulation flaws in other web applications and ensure proper access controls are in place for all user management functions.