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Vulnerability record · CVE-2016-4465 · published 4 July 2016

CVE-2016-4465: Apache struts improper input validation vulnerability

Apache · Struts

The URLValidator class in Apache Struts 2 2.3.20 through 2.3.28.1 and 2.5.x before 2.5.1 allows remote attackers to cause a denial of service via a null value for a URL field.

5.3 CVSS 3.0 Medium EPSS 10% · top 4.4% CWE-20 · Improper input validation
5.3CVSS 3.0 base score, v2 5.0
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

The URLValidator class in Apache Struts 2 2.3.20 through 2.3.28.1 and 2.5.x before 2.5.1 allows remote attackers to cause a denial of service via a null value for a URL field.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://jvn.jp/en/jp/JVN12352818/index.html Vendor Advisory
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000114 VDB EntryVendor Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg21987854 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.securityfocus.com/bid/91278
https://bugzilla.redhat.com/show_bug.cgi?id=1348253 Issue Tracking
https://struts.apache.org/docs/s2-041.html Vendor Advisory
http://jvn.jp/en/jp/JVN12352818/index.html Vendor Advisory
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000114 VDB EntryVendor Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg21987854 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.securityfocus.com/bid/91278
https://bugzilla.redhat.com/show_bug.cgi?id=1348253 Issue Tracking
https://struts.apache.org/docs/s2-041.html Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-4465), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.