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Servers and applications

CVE-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 wildcard namespace and similar to results, same possibility when using url tag which doesn't have value and action…

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021.

Severity
High 8.1
Published
22 Aug 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.3.35, 2.5.17
Exploit chance
100% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Apache StrutsServers and applications · cpe:a:apache:struts
  • From 2.0.4 before 2.3.35
  • From 2.5.0 before 2.5.17

Known exploited

CISA name
Apache Struts Remote Code Execution Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-11776
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-11776