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Vulnerability record · CVE-2016-4433 · published 4 July 2016

CVE-2016-4433: Apache struts improper input validation vulnerability

Apache · Struts

Apache Struts 2 2.3.20 through 2.3.28.1 allows remote attackers to bypass intended access restrictions and conduct redirection attacks via a crafted request.

7.5 CVSS 3.0 High EPSS 9.8% · top 4.6% CWE-20 · Improper input validation
7.5CVSS 3.0 base score, v2 5.0
9.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

Apache Struts 2 2.3.20 through 2.3.28.1 allows remote attackers to bypass intended access restrictions and conduct redirection attacks via a crafted request.

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

Affected products

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

References

LinkTags
http://jvn.jp/en/jp/JVN45093481/index.html Vendor Advisory
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000112 VDB EntryVendor Advisory
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1009282 Third Party 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/91282
https://bugzilla.redhat.com/show_bug.cgi?id=1348251 Issue Tracking
https://struts.apache.org/docs/s2-039.html Vendor Advisory
http://jvn.jp/en/jp/JVN45093481/index.html Vendor Advisory
http://jvndb.jvn.jp/jvndb/JVNDB-2016-000112 VDB EntryVendor Advisory
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1009282 Third Party 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/91282
https://bugzilla.redhat.com/show_bug.cgi?id=1348251 Issue Tracking
https://struts.apache.org/docs/s2-039.html Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2016-4433), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.