Intel

AIKIDO-2026-10513

mppx is vulnerable to Replay Attacks

Replay Attacks Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.
Published Apr 23, 2026

53

Medium Risk

This Affects:

JSmppx
0.0.1 - 0.6.1
Fixed in 0.6.2
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TL;DR

An improper authorization issue in wevm mppx allowed payment credentials to be reused across different API routes because challenges were not bound to a route-specific scope and verifyCredential() did not enforce scope matching, enabling cross-route replay of valid credentials and unauthorized access to protected endpoints with equivalent pricing parameters.

Who does this affect?

You are affected if you are using a version that falls within the vulnerable range.

Background info

mppx is vulnerable to Replay Attacks in versions 0.0.1 - 0.6.1.

How to fix this

Upgrade the mppx library to the patch version.