CVE-2021-27884

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CVSS 3.1

5.1 medium

EPSS

<1%p27

Published

Mar 1, 2021 (Mar 1, 2021)

Modified

Jun 17, 2026

Description

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.

Vendors: ymfe
Products: yapi
Weakness: CWE-330
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.3%)

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