CVE-2006-0509 in Helpdesk
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in clients.php in Cerberus Helpdesk, possibly 2.7, allow remote attackers to inject arbitrary web script or HTML via (1) the contact_search parameter and (2) unspecified url fields.
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Analysis
by VulDB Data Team • 08/14/2025
The CVE-2006-0509 vulnerability represents a critical cross-site scripting flaw in Cerberus Helpdesk's clients.php script, specifically affecting version 2.7 and potentially other iterations of the software. This vulnerability exposes the application to remote code execution through malicious web script injection, creating significant security risks for organizations relying on the helpdesk system. The flaw manifests through two distinct attack vectors that exploit input validation weaknesses in the application's parameter handling mechanisms.
The technical implementation of this vulnerability stems from inadequate sanitization of user-supplied input within the contact_search parameter and unspecified url fields. When users submit data through these parameters, the application fails to properly validate or escape the input before processing or displaying it within the web interface. This allows malicious actors to inject HTML tags, JavaScript code, or other malicious content that executes in the context of other users' browsers. The vulnerability specifically targets the client-side processing of user inputs without proper security controls, creating a pathway for persistent XSS attacks that can compromise user sessions and steal sensitive information.
The operational impact of this vulnerability extends beyond simple data theft, as it enables attackers to manipulate the helpdesk interface for various malicious purposes. Attackers can hijack user sessions, redirect victims to phishing sites, or inject malicious scripts that persistently compromise user browsers. The vulnerability affects the core functionality of the helpdesk system, potentially allowing unauthorized access to customer data, internal communications, and support ticket information. Organizations using Cerberus Helpdesk may experience service disruption, data breaches, and compliance violations when this vulnerability is exploited, particularly in environments where sensitive customer information is processed.
Security professionals should address this vulnerability through immediate input validation and output encoding measures. The recommended approach involves implementing comprehensive parameter sanitization, using established XSS prevention libraries, and applying proper HTML escaping techniques to all user-supplied inputs. Organizations should also consider implementing content security policies, regular security audits, and input validation frameworks that align with industry standards such as those defined in CWE-79 for cross-site scripting vulnerabilities. Additionally, the mitigation strategy should include network segmentation, monitoring for suspicious user behavior, and regular updates to ensure the helpdesk system remains protected against similar vulnerabilities. This vulnerability demonstrates the critical importance of input validation in web applications and aligns with ATT&CK technique T1213 for data from information repositories, highlighting the need for robust application security controls.