CVE-2020-4421: IBM WebSphere Application Server

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.

Affected products

• IBM WebSphere Application Server: from 19.0.0.5, before 20.0.0.5 (fixed in 20.0.0.5)

Published 2020-05-06. Last modified 2026-06-17.