High
CVSS 7.8 CORS Responsible Disclosure
Disclosure
HIGH - CORS Wildcard on ALL 4 IMT Backend APIs (367 Endpoints Affected)
Finding 36: HIGH - CORS Wildcard on ALL 4 IMT Backend APIs (367 Endpoints Affected) Severity: High (CVSS 7.4 - AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N) Summary: 4 IMT backend API'nin TAMAMI `Access-Control-Allow-Origin: ` ve `Access-Control-Expose-Headers: ` ile yapilandirilmistir. B
- Target
- Turkish Payment Gateway
- 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.