Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in the WebAuthn Relying Party field within the Datacenter configuration of Proxmox Virtual Environment (PVE) 8.4. Authenticated users can inject malicious JavaScript code into this field, which is then stored and later executed in the browsers of users who view the configuration page. This enables client-side attacks such as stealing session cookies or performing actions on behalf of the victim user.

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Impact Analysis

The vulnerability can lead to client-side attacks where malicious JavaScript code runs in the context of users viewing the affected configuration page. This can result in theft of sensitive information like session tokens, unauthorized actions performed on behalf of users, or other malicious activities that compromise user accounts and system integrity.

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Mitigation Strategies

To mitigate the stored XSS vulnerability in the WebAuthn Relying Party field within the Datacenter configuration of Proxmox Virtual Environment 8.4, you should restrict authenticated user permissions to prevent unauthorized JavaScript injection and monitor for updates or patches from Proxmox addressing this issue. Since no specific patch or workaround is detailed, limiting access and avoiding use of the vulnerable field until a fix is available is recommended.

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