Compliance Impact

This vulnerability allows an attacker to execute arbitrary JavaScript in the victim's browser within the context of the AVideo origin by exploiting unescaped user input in a script block. Such cross-site scripting (XSS) vulnerabilities can lead to unauthorized access to user data, session hijacking, or other malicious actions.

Because of these risks, the vulnerability could impact compliance with data protection regulations such as GDPR and HIPAA, which require adequate security measures to protect personal and sensitive information from unauthorized access or disclosure.

Failure to address this vulnerability may result in non-compliance with these standards due to potential data breaches or exposure of protected health information (PHI) or personally identifiable information (PII).

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Executive Summary

This vulnerability exists in WWBN AVideo, an open source video platform, in versions up to and including 29.0. The issue is in the plugin/Meet/iframe.php file, where the user and pass query parameters are inserted into a JavaScript double-quoted string literal inside a <script> block without proper escaping. Because these parameters are attacker-controlled, an attacker can craft a URL that breaks out of the string context and executes arbitrary JavaScript code in the victim's browser within the AVideo origin.

No authentication is required to exploit this vulnerability if a public Meet schedule exists on the target, making it easier for attackers to leverage.

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Impact Analysis

This vulnerability allows an attacker to execute arbitrary JavaScript in the context of the victim's browser on the AVideo platform. This can lead to several impacts including theft of sensitive information such as cookies or session tokens, performing actions on behalf of the victim, or redirecting the victim to malicious sites.

Since no authentication is required if a public Meet schedule exists, attackers can easily exploit this vulnerability to target users without needing credentials.

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Mitigation Strategies

To mitigate this vulnerability, update WWBN AVideo to a version later than 29.0 where the issue in plugin/Meet/iframe.php has been fixed, as indicated by commit 3298ced2bcf92e4f3acff6ce9bde14edf42ecb5b.

Additionally, consider restricting access to public Meet schedules or disabling the affected plugin if an immediate update is not possible.

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