Vulnerabilidades de Wwbn

WWBN AVideo is an open source video platform. Prior to version 21.0, AVideo allows Markdown in video comments and uses Parsedown (v1.7.4) without Safe Mode enabled. Markdown links are not sufficiently sanitized, allowing `javascript:` URIs to be rendered as clickable links. An authenticated low-privilege attacker can post a malicious comment that injects persistent JavaScript. When another user clicks the link, the attacker can perform actions such as session hijacking, privilege escalation (including admin takeover), and data exfiltration. Version 21.0 contains a fix. As a workaround, validate and block unsafe URI schemes (e.g., `javascript:`) before rendering Markdown, and enable Parsedown Safe Mode.

AVideo versions prior to 20.1 contain an open redirect vulnerability caused by insufficient validation of the siteRedirectUri parameter during user registration. Attackers can redirect users to external sites, facilitating phishing attacks.

AVideo versions prior to 20.1 are vulnerable to an open redirect flaw due to missing validation of the cancelUri parameter during user login. An attacker can craft a link to redirect users to arbitrary external sites, enabling phishing attacks.

AVideo versions prior to 20.1 are vulnerable to an insecure direct object reference (IDOR) that allows any authenticated user to delete media files belonging to other users. The affected endpoint validates authentication but fails to verify ownership or edit permissions for the targeted video.