CVE-2006-5036 in Mysource Classic
Summary
by MITRE
MySource Matrix 3.8 and earlier, and MySource 2.x, allow remote attackers to use the application as an HTTP proxy server via the sq_remote_page_url parameter to access arbitrary sites with the server's IP address and conduct cross-site scripting (XSS) attacks. NOTE: the researcher reports that "The vendor does not consider this a vulnerability.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability described in CVE-2006-5036 represents a significant security flaw in MySource Matrix and MySource content management systems version 3.8 and earlier, as well as MySource 2.x versions. This issue stems from the improper handling of HTTP requests within the application's remote page functionality, creating an unintended proxy server capability that can be exploited by remote attackers. The vulnerability specifically manifests through the sq_remote_page_url parameter, which allows malicious actors to leverage the server's IP address for accessing arbitrary websites and conducting cross-site scripting attacks.
The technical implementation of this vulnerability involves the application's failure to properly validate and sanitize user input passed through the sq_remote_page_url parameter. When an attacker submits a crafted URL through this parameter, the application processes it without adequate security controls, effectively transforming the vulnerable server into an HTTP proxy. This proxy functionality enables attackers to route their requests through the target server's IP address, masking their true origin and potentially bypassing network security controls. The flaw creates a pathway for attackers to access external resources that might otherwise be restricted or protected by firewall rules, while simultaneously providing an avenue for cross-site scripting exploitation.
The operational impact of this vulnerability extends beyond simple proxy functionality to include serious security implications for organizations using affected MySource versions. Attackers can leverage this vulnerability to perform various malicious activities including data exfiltration, web application attacks against internal systems, and reconnaissance operations. The cross-site scripting component adds additional risk as it allows attackers to inject malicious scripts into web pages viewed by other users, potentially leading to session hijacking, credential theft, or further compromise of the application environment. This vulnerability demonstrates a critical failure in input validation and access control mechanisms, creating a persistent security risk that could be exploited repeatedly.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-829, which addresses the inclusion of untrusted input in security decisions, and CWE-20, which covers improper input validation. The attack vector follows patterns consistent with the ATT&CK framework's proxy techniques, specifically T1090.001 for proxying and T1566 for credential access through social engineering. Organizations should implement immediate mitigations including input validation controls, parameter sanitization, and network-level restrictions to prevent unauthorized proxy usage. The vendor's classification of this issue as non-vulnerable does not negate the security risks it presents, and organizations should treat this as a critical security concern requiring immediate attention and remediation through proper patching or alternative access controls.
The broader implications of this vulnerability highlight the importance of proper application security design and the dangers of unintended functionality within web applications. Modern security practices emphasize the principle of least privilege and input validation as fundamental controls, making this type of vulnerability particularly concerning for organizations relying on legacy content management systems. Regular security assessments and vulnerability management programs should identify similar issues in other applications, as the underlying architectural flaws that enable proxy functionality often extend beyond single vulnerabilities to systemic security weaknesses requiring comprehensive remediation strategies.