Critical
CVSS 9.1 Credential Exposure Responsible Disclosure
Disclosure
Hardcoded OAuth Client Credentials in Production JavaScript
OAuth client id and secret embedded in JS allow forging tokens against backend API used by Bitcoin ATM network.
- Target
- EU Crypto ATM Operator
- Category
- Credential Exposure
- 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.