Vulnerability record · CVE-2016-4003 · published 12 April 2016

CVE-2016-4003: Apache struts cross-site scripting vulnerability

Apache · Struts

Cross-site scripting (XSS) vulnerability in the URLDecoder function in JRE before 1.8, as used in Apache Struts 2.x before 2.3.28, when using a single byte page encoding, allows remote attackers to inject arbitrary web script or HTML via multi-byte characters in a url-encoded parameter.

6.1 CVSS 3.0 Medium EPSS 12% · top 4.1% CWE-79 · Cross-site scripting

6.1CVSS 3.0 base score, v2 4.3

12%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

8References

17 Jun 2026Last modified by NVD

Description

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

Affected products

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

Struts Apache

References

Link	Tags
http://struts.apache.org/docs/s2-028.html	Vendor Advisory
http://www.securityfocus.com/bid/86311	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035268	Third Party AdvisoryVDB Entry
https://issues.apache.org/jira/browse/WW-4507	Vendor Advisory
http://struts.apache.org/docs/s2-028.html	Vendor Advisory
http://www.securityfocus.com/bid/86311	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035268	Third Party AdvisoryVDB Entry
https://issues.apache.org/jira/browse/WW-4507	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-2016-4003), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.