CVE-2018-11776: Apache Struts Remote Code Execution Vulnerability

High severity, CVSS 8.1. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 100% chance of exploitation in the next 30 days.

Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible Remote Code Execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn't have value and action set and in same time, its upper package have no or wildcard namespace.

Affected products

• Apache Struts: from 2.0.4, before 2.3.35 (fixed in 2.3.35); from 2.5.0, before 2.5.17 (fixed in 2.5.17)
• Netapp Active Iq Unified Manager: from 7.3; from 9.5
• Netapp Oncommand Insight: affected versions not specified
• Netapp Oncommand Workflow Automation: affected versions not specified
• Netapp Snapcenter: affected versions not specified
• Oracle Communications Policy Management: before 12.5.0 (fixed in 12.5.0)
• Oracle Enterprise Manager Base Platform: version 13.3.0.0 only; version 13.4.0.0 only
• Oracle MySQL Enterprise Monitor: up to and including 3.4.9.4237; from 4.0.0, up to and including 4.0.6.5281; from 8.0.0, up to and including 8.0.2.8191

Published 2018-08-22. Last modified 2026-06-17.