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Actively exploited · Published Aug 22, 2018 · Assigned by apache

CVE-2018-11776

High 8.1 Exploited

In plain English

A high-severity security flaw in Apache Struts from Apache Software Foundation. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 100.0% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)100.0%top 0.0% of all CVEs
Exploited in the wildYesCISA KEV since Nov 3, 2021
Attack tooling3Metasploit, Nuclei, Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 3, 2022.

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.apache.struts:struts2-core2.3.35GHSA-cr6j-3jp9-rw65
Mavenorg.apache.struts:struts2-core2.5.17GHSA-cr6j-3jp9-rw65

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Struts 2.3 to 2.3.342.5 to 2.5.16

References