Toward Secure Web to ERP Payment Flows: A Case Study of HTTP Header Trust Failures in SAP Based Systems
This addresses security risks in enterprise payment systems for organizations using SAP and similar ERPs, though it is incremental as it builds on existing integration security knowledge.
The paper tackled vulnerabilities in web-to-ERP payment flows by analyzing a case study where HTTP header trust failures in SAP systems allowed unpaid transactions to be incorrectly marked as completed, and proposed design practices like formalizing state machines and strengthening trust boundaries to enhance security.
Electronic banking portals often sit in front of enterprise resource planning (ERP) systems such as SAP, mediating payment requests between users and back end financial infrastructure. When these integrations place excessive trust in client supplied HTTP metadata, subtle design flaws can arise that undermine payment integrity. This article presents a retrospective, anonymized case study of an SAP based payment flow in which weaknesses in HTTP level validation allowed the front end application to incorrectly treat unpaid transactions as completed. Rather than provide a reproducible exploit, we abstract the scenario into a general vulnerability pattern, analyze contributing architectural decisions, and propose concrete design and verification practices for secure web to ERP payment processing. The discussion emphasizes formalizing payment state machines, strengthening trust boundaries, and incorporating regular security review into integration projects.