Critical
CVSS 9.1 CORS Responsible Disclosure
Disclosure
CORS Misconfiguration — Arbitrary Origin Reflection with Credentials (CRITICAL)
Finding 1: CORS Misconfiguration — Arbitrary Origin Reflection with Credentials (CRITICAL) `api.[redacted].com` reflects ANY `Origin` header value in `Access-Control-Allow-Origin` with `Access-Control-Allow-Credentials: true`. This allows any malicious website to make authenticated
- Target
- Gaming Marketplace
- Category
- CORS
- 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.