CVE-2026-40907: Wwbn/avideo WWBN AVideo Has An IDOR Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gpgp-w4x2-h3h7",
  "modified" : "2026-04-24T20:29:53Z",
  "published" : "2026-04-14T22:49:05Z",
  "aliases" : [ "CVE-2026-40907" ],
  "summary" : "WWBN AVideo has an IDOR in Live Restreams list.json.php Exposes Other Users' Stream Keys and OAuth Tokens",
  "details" : "## Summary\n\nThe endpoint `plugin/Live/view/Live_restreams/list.json.php` contains an Insecure Direct Object Reference (IDOR) vulnerability that allows any authenticated user with streaming permission to retrieve other users' live restream configurations, including third-party platform stream keys and OAuth tokens (access_token, refresh_token) for services like YouTube Live, Facebook Live, and Twitch.\n\n## Details\n\nThe authorization logic in `list.json.php` is intended to restrict non-admin users to viewing only their own restream records. However, the implementation at lines 10-14 only enforces this when the `users_id` GET parameter is absent:\n\n```php\n// plugin/Live/view/Live_restreams/list.json.php:6-19\nif (!User::canStream()) {\n    die('{\"data\": []}');\n}\n\nif (empty($_GET['users_id'])) {       // Line 10: only triggers when param is MISSING\n    if (!User::isAdmin()) {\n        $_GET['users_id'] = User::getId();  // Line 12: force to own ID\n    }\n}\n\nif (empty($_GET['users_id'])) {\n    $rows = Live_restreams::getAll();\n} else {\n    $rows = Live_restreams::getAllFromUser($_GET['users_id'], \"\");  // Line 19: attacker-controlled ID\n}\n```\n\nWhen a non-admin user explicitly supplies `?users_id=<victim_id>`, the value is non-empty, so the override at line 12 is never reached. The attacker-controlled ID passes directly to `getAllFromUser()`, which executes:\n\n```php\n// plugin/Live/Objects/Live_restreams.php:90\n$sql = \"SELECT * FROM live_restreams WHERE users_id = $users_id\";\n```\n\nThis returns all columns from the `live_restreams` table, including:\n- `stream_key` (VARCHAR 500) — the victim's RTMP stream key for third-party platforms\n- `stream_url` (VARCHAR 500) — the RTMP ingest endpoint\n- `parameters` (TEXT) — JSON blob containing OAuth credentials (`access_token`, `refresh_token`, `expires_at`) obtained via the restream.ypt.me OAuth flow\n\nOther endpoints in the same directory correctly validate ownership. For example, `delete.json.php:19`:\n```php\nif (!User::isAdmin() && $row->getUsers_id() != User::getId()) {\n    $obj->msg = \"You are not admin\";\n    die(json_encode($obj));\n}\n```\n\nThis ownership check is missing from `list.json.php`.\n\n## PoC\n\n**Prerequisites:** Two user accounts — attacker (user ID 2, streaming permission) and victim (user ID 1, has configured restreams with third-party platform keys).\n\n**Step 1:** Attacker authenticates and retrieves their session cookie.\n\n**Step 2:** Attacker requests victim's restream list:\n```bash\ncurl -s -b 'PHPSESSID=<attacker_session>' \\\n  'https://target.com/plugin/Live/view/Live_restreams/list.json.php?users_id=1'\n```\n\n**Expected response (normal behavior):** Empty data or error.\n\n**Actual response:** Full restream records for user ID 1:\n```json\n{\n  \"data\": [\n    {\n      \"id\": 1,\n      \"name\": \"YouTube Live\",\n      \"stream_url\": \"rtmp://a.rtmp.youtube.com/live2\",\n      \"stream_key\": \"xxxx-xxxx-xxxx-xxxx-xxxx\",\n      \"parameters\": \"{\\\"access_token\\\":\\\"ya29.a0A...\\\",\\\"refresh_token\\\":\\\"1//0e...\\\",\\\"expires_at\\\":1712600000}\",\n      \"users_id\": 1,\n      \"status\": \"a\"\n    }\n  ]\n}\n```\n\n**Step 3:** Attacker can enumerate all user IDs (1, 2, 3, ...) to harvest all configured restream credentials across the platform.\n\n## Impact\n\n- **Credential theft:** Attacker obtains third-party platform stream keys and OAuth tokens (access_token, refresh_token) for all users who have configured live restreaming.\n- **Unauthorized broadcasting:** Stolen RTMP stream keys allow the attacker to broadcast arbitrary content to the victim's YouTube, Facebook, or Twitch channels.\n- **OAuth token abuse:** Stolen refresh tokens can be used to obtain new access tokens, providing persistent access to the victim's third-party accounts within the scope of the original OAuth grant.\n- **Full enumeration:** User IDs are sequential integers, enabling trivial enumeration of all platform users' restream credentials.\n\n## Recommended Fix\n\nAdd an ownership check in `list.json.php` consistent with the pattern used in `delete.json.php` and `add.json.php`:\n\n```php\n// plugin/Live/view/Live_restreams/list.json.php — replace lines 10-14\nif (!User::isAdmin()) {\n    $_GET['users_id'] = User::getId();\n}\n```\n\nThis unconditionally forces non-admin users to their own user ID, regardless of whether the `users_id` parameter was supplied. The `empty()` check should be removed so that the parameter cannot be used to bypass the restriction.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "wwbn/avideo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "29.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/WWBN/AVideo/security/advisories/GHSA-gpgp-w4x2-h3h7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-40907"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WWBN/AVideo/commit/d5992fff2811df4adad1d9fc7d0a5837b882aed7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/WWBN/AVideo"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-639" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-14T22:49:05Z",
    "nvd_published_at" : "2026-04-21T20:17:03Z"
  }
}