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ExploitedIn CISA KEVFix available

CVE-2018-11776

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2018-08-22
  • Fixed in2.5.17 · 2.3.35

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-08-2213:29CVE publishedNVD
  2. 2018-08-25Exploit-DB entryExploit-DB
  3. 2021-11-03Added to the CISA KEV catalogCISA KEV
  4. 2021-11-03Listed as exploited by GCVEGCVE
  5. 2021-11-03Exploitation first reportedCISA KEV
  6. 2025-02-0621:01SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-11776?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-11776?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Apache struts
BranchAffectedFixed in
2.5≥ 2.5.0, < 2.5.172.5.17
2.5≥ 2.5, < 2.5.172.5.17
2.x≥ 2.0.4, < 2.3.352.3.35
Oracle mysql enterprise monitor
BranchAffectedFixed in
3.4≤ 3.4.9.4237no fix published
4.0≥ 4.0.0, ≤ 4.0.6.5281no fix published
8.0≥ 8.0.0, ≤ 8.0.2.8191no fix published
Netapp active iq unified manager
BranchAffectedFixed in
7.3+≥ 7.3no fix published
9.5+≥ 9.5no fix published

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apache Software Foundation Apache Struts
    Affected
    • = 2.3 to 2.3.34no fix stated
    • = 2.5 to 2.5.16no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-06-12

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2018-11776 Red Hat Product Security

    struts2: Using specific results and namespaces can result in a remote code execution

Full record on NVD

Fix

  1. Update Apache struts to 2.5.17 · 2.3.35
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-05-03

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-45260EDB-45262EDB-45367
Exploit-DB
Proof-of-concept repositories
17 repositories, unverifiedxfox64x/CVE-2018-11776jiguangsdf/CVE-2018-11776hook-s3c/CVE-2018-11776-Python-PoCmazen160/struts-pwn_CVE-2018-11776bhdresh/CVE-2018-11776
PoC-in-GitHub
Metasploit modules
1 moduleexploit/multi/http/struts2_namespace_ognlrank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2022-05-03
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-08-22
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-cr6j-3jp9-rw65

Frequently asked questions

What is 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 set and in same time, its upper package have no or wildcard namespace.

Is CVE-2018-11776 actively exploited?

Yes. CVE-2018-11776 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2018-11776?

CVE-2018-11776 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record