Critical
CVSS 10.0 Broken Authentication Responsible Disclosure
Disclosure
OAuth2 Token Forge Grants 30-Day Access Token for Any User
Token endpoint issues valid 30-day bearer tokens for arbitrary user IDs without credentials, impacting 1.73M investors.
- Target
- SEA Investment Platform
- Category
- Broken Authentication
- Channel
- Responsible Disclosure
- Disclosed
- 2026-04
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.