High
CVSS 7.5 Information Disclosure Responsible Disclosure
Disclosure
HTML Email Injection via Purchase Receipts Enables Phishing
Product name field is rendered in receipt HTML emails without encoding allowing arbitrary phishing payloads from merchant-branded sender.
- Target
- European Payment Gateway
- Category
- Information Disclosure
- 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.