CVE-2021-20454: IBM WebSphere Application Server

High severity, CVSS 8.2. EPSS: 2.8% chance of exploitation in the next 30 days.

IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 196649.

Affected products

• IBM WebSphere Application Server: from 7.0.0.0, up to and including 7.0.0.45; from 8.0.0.0, up to and including 8.0.0.15; from 8.5.0.0, up to and including 8.5.5.19; from 9.0.0.0, up to and including 9.0.5.7

Published 2021-04-21. Last modified 2026-06-17.