High
CVSS 8.1 CORS HackerOne
Disclosure
CORS Wildcard on 23+ Authenticated User/Order Endpoints with DELETE Method Allowed
The SLS API at sls.[vendor] exposes 23+ authenticated user and order management endpoints behind a CORS wildcard () policy that also allows the DELETE HTTP method and accepts Authorization/X-Api-Key headers. While Access-Control-Allow-Credentials is not set (preventing cookie-based CSRF), the API uses Bearer token or API key authentication
- Target
- SEA Gaming Marketplace
- Category
- CORS
- Channel
- HackerOne
- 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 HackerOne 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.