CVE-2021-27884: Ymfe Yapi

Medium severity, CVSS 5.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Weak JSON Web Token (JWT) signing secret generation in YMFE YApi through 1.9.2 allows recreation of other users' JWT tokens. This occurs because Math.random in Node.js is used.

Affected products

• Ymfe Yapi: up to and including 1.9.2

Published 2021-03-01. Last modified 2026-06-17.