Apache Struts vulnerable to remote command execution (RCE) due to improper input validation

HIGH 8.1EXPLOITED (CISA KEV)CVE-2018-11776 · GHSA-cr6j-3jp9-rw65 · Published 22/08/2018 · updated 17/06/2026

Apache Struts Remote Code Execution Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/11/2021. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
org.apache.struts:struts2-core Maven	`≥ 2.0.4, < 2.3.35≥ 2.5, < 2.5.17`	`2.3.352.5.17`
struts apache	`≥ 2.0.4, < 2.3.35≥ 2.5.0, < 2.5.17`	`2.3.352.5.17`
active iq unified manager netapp	`≥ 7.3≥ 9.5`	No fix yet
communications policy management oracle	`< 12.5.0`	`12.5.0`
enterprise manager base platform oracle	`= 13.3.0.0= 13.4.0.0`	No fix yet
mysql enterprise monitor oracle	`≥ 4.0.0, ≤ 4.0.6.5281≥ 8.0.0, ≤ 8.0.2.8191≤ 3.4.9.4237`	No fix yet

Description

Apache Struts contains a Remote Code Execution when using results with no namespace and it's upper actions have no or wildcard namespace. The same flaw exists when using a url tag with no value, action set, and it's upper actions have no or wildcard namespace.

NVD description

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.

References

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