CVE-2006-5064 in BirdBlog
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in BirdBlog 1.4 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) entryid parameter in comment.php, (2) page parameter in index.php, or the (3) uid parameter in user.php. NOTE: the provenance of this information is unknown; the details are obtained from third party information.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability described in CVE-2006-5064 represents a critical cross-site scripting flaw affecting BirdBlog version 1.4 and earlier. This vulnerability resides in the web application's handling of user-supplied input parameters, creating an avenue for remote attackers to execute malicious scripts within the context of other users' browsers. The flaw manifests across three distinct entry points within the application's core functionality, each presenting unique attack vectors that collectively compromise the security posture of the entire system.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization within the BirdBlog application's PHP scripts. Specifically, the entryid parameter in comment.php, the page parameter in index.php, and the uid parameter in user.php all fail to properly sanitize user-provided data before incorporating it into dynamic web content. This lack of proper input filtering allows attackers to inject malicious HTML or JavaScript code that executes in the victim's browser when the affected pages are rendered. The vulnerability directly maps to CWE-79 which defines Cross-Site Scripting as a condition where an application includes untrusted data in a new web page without proper validation or escaping, or without the use of output encoding techniques.
The operational impact of CVE-2006-5064 extends beyond simple data theft or defacement. Attackers can leverage these vulnerabilities to hijack user sessions, redirect victims to malicious websites, steal sensitive cookies, or even perform actions on behalf of authenticated users. The three distinct attack vectors increase the attack surface and provide multiple opportunities for successful exploitation, making this vulnerability particularly dangerous in environments where users frequently interact with the blog application. The vulnerability's classification as remote indicates that attackers can exploit it without requiring physical access or local network presence, making it accessible to anyone with internet connectivity.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The most effective approach involves sanitizing all user-supplied input parameters using proper escaping techniques before rendering them in web pages. This includes implementing proper HTML entity encoding for output, employing allow-list validation for input parameters, and utilizing secure coding practices that prevent direct injection of user data into dynamic content. Additionally, implementing Content Security Policy headers and establishing proper input validation at the application level can significantly reduce the risk of exploitation. The vulnerability's age and the availability of modern secure coding frameworks make this remediation straightforward for organizations that maintain up-to-date security practices, though the lack of standardized mitigation guidance in the original report suggests that organizations may have struggled with implementing adequate protections at the time of discovery. This vulnerability aligns with ATT&CK technique T1059.002 which describes the use of scripting languages for execution, particularly in web-based environments where attackers can leverage XSS to execute malicious code through compromised user sessions.