Unauthenticated Cross Site Scripting in Contest Gallery

Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability affecting Contest Gallery plugin versions up to and including 30.0.6. It allows attackers to inject malicious scripts into web pages viewed by other users without needing authentication.

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Detection Guidance

To detect this XSS vulnerability in Contest Gallery <= 30.0.6, inspect web application inputs for unsanitized user-supplied data. Check form fields, URL parameters, and HTTP headers for script tags or event handlers like onerror= or onload=. Use browser developer tools to monitor network requests for suspicious payloads. Test with payloads like <script>alert(1)</script> in input fields.

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Impact Analysis

An attacker could steal user sessions, redirect users to malicious sites, or deface the website. Since it requires user interaction (UI:R in CVSS), victims must click a crafted link or visit a compromised page for the attack to succeed.

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Compliance Impact

This vulnerability is an Unauthenticated Cross Site Scripting (XSS) issue in Contest Gallery <= 30.0.6. XSS vulnerabilities can allow attackers to inject malicious scripts into web pages viewed by users, potentially leading to data theft or unauthorized actions. This could impact compliance with GDPR by risking exposure of personal data and HIPAA by compromising protected health information if such data is processed by the affected software.

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Mitigation Strategies

Update Contest Gallery to the latest version (30.0.6 or higher) to patch the XSS vulnerability. If an update is not available, consider disabling or removing the plugin until a fix is released.

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