FV Flowplayer Video Player WordPress Plugin vulnerabilities

The FV Flowplayer Video Player plugin for WordPress (all versions up to and including 7.5.55.7212) is vulnerable to Stored Cross-Site Scripting via the 'fv_player_videos[_fv_player_user_video][]' parameter due to insufficient input sanitization and output escaping. This allows authenticated attackers with subscriber-level access and above to inject arbitrary web scripts that execute when a user visits the injected page. This requires an administrator to have enabled the 'Allow visitors to upload videos to their profile' setting.

The FV Flowplayer Video Player plugin for WordPress (all versions up to and including 7.5.55.7212) is vulnerable to Stored Cross-Site Scripting via the 'comment (shortcode attribute 'align')' parameter due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a user visits the injected page. This requires the plugin's 'Parse Vimeo and YouTube links' setting to be enabled.

The FV Flowplayer Video Player plugin for WordPress (all versions up to and including 7.5.55.7212) is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a user visits the injected page. This requires the 'Parse Vimeo and YouTube links' option to be enabled and a site administrator to approve the comment containing the malicious shortcode.

The FV Flowplayer Video Player WordPress plugin before version 7.5.55.7212 does not properly validate a user-supplied URL before performing a server-side fetch, and an existing host-based restriction fails to cover all cases, allowing users with Contributor-level access and above to perform Server-Side Request Forgery (SSRF) attacks. The impact is limited to a semi-blind oracle: the server's fetch reveals whether an internal resource responds and its HTTP status, but the resource's contents are not returned to the attacker.