CVE-2018-11776

Apache Struts Remote Code Execution Vulnerability

  • High 8.1
  • Exploited: added to CISA KEV 3 Nov 2021
  • A public exploit reference is listed

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.

Key facts

Published
22 Aug 2018
Last changed
21 Oct 2025
Assigned by
apache
KEV added
3 Nov 2021
KEV fix due
3 May 2022
EPSS
99.996% likely to be exploited in the next 30 days, higher than 99.989% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 8.1CVSS 3.1, Highfrom CISA (ADP container)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

  • Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
Apache Software FoundationApache Struts
  • 2.3 to 2.3.34 (affected)
  • 2.5 to 2.5.16 (affected)

Timeline

  1. 22 Aug 2018 Published
  2. 3 Nov 2021 CVE-2018-11776 added to CISA KEV
  3. 3 Nov 2021 Added to the CISA KEV catalogue

References