CVE-2008-6173 in ClipShare
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in fullscreen.php in ClipShare Pro 4.0 allows remote attackers to inject arbitrary web script or HTML via the title parameter.
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Analysis
by VulDB Data Team • 05/03/2025
The vulnerability identified as CVE-2008-6173 represents a critical cross-site scripting flaw located within the fullscreen.php component of ClipShare Pro version 4.0. This security weakness specifically manifests through the improper handling of user-supplied input in the title parameter, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of affected users' browsers. The vulnerability falls under the well-established CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security flaw that has been consistently documented across numerous security frameworks and standards. The ClipShare Pro platform, designed for video sharing and content management, becomes compromised when users interact with maliciously crafted title parameters that are not properly sanitized or validated before being rendered back to other users.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious title parameter containing embedded script code that gets processed by the fullscreen.php script without adequate input validation or output encoding. When legitimate users view content that includes this malicious title, their browsers execute the injected scripts within the context of the vulnerable application, potentially leading to session hijacking, data theft, or further malicious activities. This type of vulnerability is particularly dangerous because it leverages the trust relationship between the web application and its users, allowing attackers to bypass normal security restrictions that would otherwise protect the application's integrity. The flaw demonstrates a classic lack of proper input sanitization and output encoding practices that are fundamental to preventing XSS attacks across web applications.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including stealing user session cookies, redirecting users to phishing sites, defacing web pages, or even executing more sophisticated attacks such as credential harvesting. Users who view content containing malicious titles may unknowingly become victims of session hijacking, where attackers can impersonate legitimate users and gain unauthorized access to their accounts. The vulnerability is particularly concerning for video sharing platforms like ClipShare Pro, where users frequently interact with content created by others, creating a wide attack surface where a single malicious title could compromise multiple users. This type of vulnerability can also serve as a stepping stone for more advanced attacks, potentially allowing threat actors to establish persistent access or escalate privileges within the application environment.
Mitigation strategies for CVE-2008-6173 should focus on implementing robust input validation and output encoding mechanisms throughout the application's codebase. The most effective approach involves sanitizing all user-supplied input, particularly parameters like the title field, through proper encoding techniques that prevent script execution when rendered in web contexts. This includes implementing proper HTML entity encoding for output, utilizing secure coding practices such as parameterized queries, and applying Content Security Policy headers to limit script execution capabilities. Organizations should also consider implementing web application firewalls to detect and block malicious payloads, conducting regular security code reviews, and ensuring that all application components are updated to the latest secure versions. The vulnerability serves as a reminder of the critical importance of input validation and output encoding practices that align with industry standards such as those outlined in the OWASP Top Ten and the NIST Cybersecurity Framework, which emphasize the need for secure coding practices to prevent common web application vulnerabilities including XSS attacks.