CVE-2026-33294: AVideo Affected by SSRF in BulkEmbed Thumbnail Fetch Allows Reading Internal Network Resources

The BulkEmbed plugin’s save endpoint (plugin/BulkEmbed/save.json.php) fetches user-supplied thumbnail URLs via url_get_contents() without SSRF protection. Unlike all six other URL-fetching endpoints in AVideo that were hardened with isSSRFSafeURL(), this code path was missed. An authenticated attacker can force the server to make HTTP requests to internal network resources and retrieve the responses by viewing the saved video thumbnail.