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Vulnerabilities

Vulnerability · CVE-2018-11776

Apache Struts Remote Code Execution Vulnerability

Published Aug 22, 2018 · catalog updated Jun 16, 2026 · Apache Struts

Patch now

CVE-2018-11776 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Apache Struts against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High8.1
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.99%
Remediation
Remediation guidance
Affected products
cpe apache/struts · cpe netapp/active iq unified manager · cpe netapp/oncommand insight · cpe netapp/oncommand workflow automation · cpe netapp/snapcenter · cpe oracle/communications policy management

Apache Struts contains a vulnerability that allows for remote code execution under two circumstances. One, where the alwaysSelectFullNamespace option is true and the value isn't set for a result defined in underlying configurations and in same time, its upper package configuration have no or wildcard namespace. Or, using URL tag which doesn't have value and action set and in same time, its upper package configuration have no or wildcard namespace. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/strutsversion unspecified
  • cpe netapp/active iq unified managerversion unspecified
  • cpe netapp/oncommand insightversion unspecified
  • cpe netapp/oncommand workflow automationversion unspecified
  • cpe netapp/snapcenterversion unspecified
  • cpe oracle/communications policy managementversion unspecified
  • vendor Apache Strutsversion unspecified

How to fix CVE-2018-11776

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2018-11776 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Apache Struts against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 99.99%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 22, 2018 · Catalog

    Detected

    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

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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

Sources

  • CISA KEVConfirmed exploitationCVE-2018-11776

    Apache Struts contains a vulnerability that allows for remote code execution under two circumstances. One, where the alwaysSelectFullNamespace option is true and the value isn't set for a result defined in underlying configurations and in same time, its upper package configuration have no or wildcard namespace. Or, using URL tag which doesn't have value and action set and in same time, its upper p

    cisa.gov
  • CVE.orgVulnerability recordCVE-2018-11776

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-11776

    30-day exploitation probability 100.0%

    first.org
  • Exploit DatabasePublic exploit reference45260

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Exploit DatabasePublic exploit reference45367

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/struts2_namespace_ognl

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2018-11776

    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

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2018-11776

    Apache Struts contains a vulnerability that allows for remote code execution under two circumstances. One, where the alwaysSelectFullNamespace option is true and the value isn't set for a result defined in underlying configurations and in same time, its upper package configuratio

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.