Stored XSS in Icegram Express WordPress Plugin

Executive Summary

This vulnerability is a stored Cross-Site Scripting (XSS) flaw in the Icegram Express WordPress plugin versions before 5.8.6. It occurs because the plugin does not properly escape a list description setting before outputting it in an HTML attribute. This allows users with Administrator privileges or higher to inject malicious scripts that are stored on the server and executed when other users view the affected pages.

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Detection Guidance

Check the installed version of the Icegram Express plugin in your WordPress admin panel. If the version is below 5.8.6, the system is vulnerable. Use WPScan to scan for vulnerable versions with: wpscan --url <your-site-url> --enumerate vp,vt

Inspect the plugin files for improper escaping in list description settings. Look for unescaped user input in HTML attributes within the plugin's codebase.

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Impact Analysis

If exploited, this vulnerability could allow attackers with Administrator access to inject scripts that steal user sessions, deface websites, or perform actions on behalf of users. Visitors to the site may unknowingly execute these scripts, leading to potential data theft or unauthorized actions.

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Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA if it results in unauthorized access to personal data or protected health information. Stored XSS may enable attackers to exfiltrate sensitive data, violating confidentiality requirements under these regulations.

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Mitigation Strategies

Update the Icegram Express plugin to version 5.8.6 or higher immediately through the WordPress admin panel or by manual installation.

Remove or restrict Administrator-level access to untrusted users to prevent potential exploitation of this flaw.

Monitor for unusual activity or unauthorized script injections in web pages served by the plugin.

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