Critical
CVSS 9.1 XSS Responsible Disclosure
Disclosure
Wildcard CORS Policy on Financial API
Finding 5: Wildcard CORS Policy on Financial API The production API at `api.[redacted].ng` returns `Access-Control-Allow-Origin: ` on all endpoints, including admin and financial transaction APIs. The application uses Bearer token authentication stored in `localStorage`, which is
- Target
- Nigerian Payment Provider
- Category
- XSS
- 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.