WWBN AVideo is an open source video platform. In versions up to and including 26.0, the AI plugin's `save.json.php` endpoint loads AI response objects using an attacker-controlled `$_REQUEST['id']` parameter without validating that the AI response belongs to the specified video. An authenticated user with AI permissions can reference any AI response ID — including those generated for other users' private videos — and apply the stolen AI-generated content (titles, descriptions, keywords, summaries, or full transcriptions) to their own video, effectively exfiltrating the information. Commit aa2c46a806960a0006105df47765913394eec142 contains a patch.

Affected: Packagist: wwbn/avideo

## Summary

The AI plugin's `save.json.php` endpoint loads AI response objects using an attacker-controlled `$_REQUEST['id']` parameter without validating that the AI response belongs to the specified video. An authenticated user with AI permissions can reference any AI response ID — including those generated for other users' private videos — and apply the stolen AI-generated content (titles, descriptions, keywords, summaries, or full transcriptions) to their own video, effectively exfiltrating the information.

## Details

In `plugin/AI/save.json.php`, the authorization flow checks that the user can edit the *target video* (`Video::canEdit($videos_id)` at line 23), but loads the AI response object from a completely separate, user-controlled parameter:

**Line 29 — metatags path (no ownership check):** ```php if(!empty($_REQUEST['ai_metatags_responses_id'])){ $ai = new Ai_metatags_responses($_REQUEST['id']); // Loads ANY response by ID if (empty($ai->getcompletion_tokens())) { forbiddenPage('AI Response not found'); } } ```

**Line 146 — transcription path (no ownership check):** ```php case 'text': if(!empty($_REQUEST['ai_transcribe_responses_id'])){ $ait = new Ai_transcribe_responses($_REQUEST['id']); // Loads ANY response by ID $value = $ait->getVtt(); ```

The `ObjectYPT` base class constructor performs a simple database lookup with no authorization: ```php public function __construct($id = "", $refreshCache = false) { i…