Critical
CVSS 9.8 Auth Bypass Responsible Disclosure
Disclosure
Email OTP Bypass via API Token — Enables Unauthorized Withdrawals
This is the core vulnerability that makes fund theft possible. When a user withdraws crypto through the website, they must enter a 6-digit code sent to their email (email OTP). However, when using an API token (generated via /auth-http/auth/business/generate-token), this email OTP check is completely skipped. The server accepts an empty security
- Target
- Crypto Gaming Platform
- Category
- Auth Bypass
- Channel
- Responsible Disclosure
- Disclosed
- 2026-03
Redaction note
Vendor identity withheld.
This finding is documented here as part of MemCyber’s public disclosure record. The vendor has been anonymized to a sector and region descriptor. Full technical detail — including root cause, reproducible proof-of-concept, remediation guidance, and vendor attribution where granted — is available to qualified prospects under NDA.
Coordinated disclosure
How we handled it.
- Reported to the vendor via Responsible Disclosure with a reproducible proof-of-concept.
- Triage + remediation window coordinated with the vendor security team.
- Fix verified before any public reference.
- This record published only after the embargo period closed.