An input validation flaw in ZenHive mpp permits unauthenticated remote attackers to inflate gas costs, causing financial degradation for the affected service sponsor.

The application improperly validates specified quantities in input (CWE-1284), which allows an unauthenticated remote client to manipulate parameters that affect gas calculations. This results in the sponsor paying significantly higher costs than intended for payment processing.

This vulnerability directly impacts the financial operating margin of the sponsor by allowing unauthorized inflation of transaction costs. With a CVSS score of 8.3, this flaw represents a high risk for platforms relying on ZenHive mpp for automated payments.

Immediate Action: Update the ZenHive mpp software to version 0.6.0 or later to implement the required input validation logic.

Proactive Monitoring: Review transaction logs for unusual patterns in gas cost consumption or high-frequency requests that deviate from typical operational baselines.

Compensating Controls: Implement strict input validation at the gateway or API layer to filter out malformed requests attempting to manipulate quantity parameters before they reach the core logic.

Public Exploit Available: Unknown

The risk of financial loss necessitates an immediate upgrade to version 0.6.0. Security teams should prioritize patching this component to prevent unauthorized manipulation of transaction costs.