CVE-2018-11776

Name: CVE-2018-11776
Creator: NVD / NIST
Published: 2018-08-22T13:29:00.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10Actively ExploitedEPSS 99.99%

Last modified Jun 17, 2026

CVE-2018-11776 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.99% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

99.99%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Affected Software

Vendor	Product	Versions
Apache	Struts	>= 2.0.4, < 2.3.35
Apache	Struts	>= 2.5.0, < 2.5.17
Netapp	Active Iq Unified Manager	>= 7.3
Netapp	Active Iq Unified Manager	>= 9.5
Netapp	Oncommand Insight	All versions
Netapp	Oncommand Workflow Automation	All versions
Netapp	Snapcenter	All versions
Oracle	Communications Policy Management	< 12.5.0
Oracle	Enterprise Manager Base Platform	13.3.0.0
Oracle	Enterprise Manager Base Platform	13.4.0.0
Oracle	Mysql Enterprise Monitor	<= 3.4.9.4237
Oracle	Mysql Enterprise Monitor	>= 4.0.0, <= 4.0.6.5281
Oracle	Mysql Enterprise Monitor	>= 8.0.0, <= 8.0.2.8191

References

http://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-005.txtBroken Link, Mailing List, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/alert-cve-2018-11776-5072787.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/105125Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041547Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041888Broken Link, Third Party Advisory, VDB Entry
https://cwiki.apache.org/confluence/display/WW/S2-057Issue Tracking, Third Party Advisory
https://github.com/hook-s3c/CVE-2018-11776-Python-PoCExploit, Third Party Advisory
https://lgtm.com/blog/apache_struts_CVE-2018-11776Exploit, Third Party Advisory
https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3EMailing List
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0012Third Party Advisory
https://security.netapp.com/advisory/ntap-20180822-0001/Third Party Advisory
https://security.netapp.com/advisory/ntap-20181018-0002/Third Party Advisory
https://www.exploit-db.com/exploits/45260/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/45262/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/45367/Exploit, Third Party Advisory, VDB Entry
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlPatch, Third Party Advisory
http://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-005.txtBroken Link, Mailing List, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/alert-cve-2018-11776-5072787.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/105125Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041547Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041888Broken Link, Third Party Advisory, VDB Entry
https://cwiki.apache.org/confluence/display/WW/S2-057Issue Tracking, Third Party Advisory
https://github.com/hook-s3c/CVE-2018-11776-Python-PoCExploit, Third Party Advisory
https://lgtm.com/blog/apache_struts_CVE-2018-11776Exploit, Third Party Advisory
https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3EMailing List
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0012Third Party Advisory
https://security.netapp.com/advisory/ntap-20180822-0001/Third Party Advisory
https://security.netapp.com/advisory/ntap-20181018-0002/Third Party Advisory
https://www.exploit-db.com/exploits/45260/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/45262/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/45367/Exploit, Third Party Advisory, VDB Entry
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlPatch, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-11776US Government Resource

Timeline

Published: Aug 22, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-11776?

How severe is CVE-2018-11776?

CVE-2018-11776 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 99.99% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-11776?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-11776?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST