CVE-2018-11776
Apache Struts Remote Code Execution Vulnerability
IN CISA KEV
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.
- Vendor
- Apache
- Product
- Struts
- CVSS 3.1
- 8.1 (high), scored by NVD (primary)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1
- 8.1 (high), scored by 134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-20
- Published
- 2018-08-22
- NVD modified
- 2026-06-17
- NVD status
- Analyzed
CISA KEV
- Date added
- 2021-11-03
- Due date
- 2022-05-03
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- packetstormsecurity.com (Third Party Advisory, VDB Entry)
- www.arubanetworks.com (Broken Link, Mailing List, Third Party Advisory)
- www.oracle.com (Patch, Third Party Advisory)
- www.oracle.com (Patch, Third Party Advisory)
- www.securityfocus.com (Broken Link, Third Party Advisory, VDB Entry)
- www.securitytracker.com (Broken Link, Third Party Advisory, VDB Entry)
- www.securitytracker.com (Broken Link, Third Party Advisory, VDB Entry)
- cwiki.apache.org (Issue Tracking, Third Party Advisory)
- lists.apache.org (Mailing List)
- psirt.global.sonicwall.com (Third Party Advisory)
- security.netapp.com (Third Party Advisory)
- security.netapp.com (Third Party Advisory)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.