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Vulnerability record · CVE-2013-4339 · published 12 September 2013

CVE-2013-4339: Wordpress improper input validation vulnerability

Wordpress · Wordpress

WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redirection restrictions via a crafted string.

7.5 CVSS 2.0 High EPSS 7.5% · top 5.7% CWE-20 · Improper input validation
7.5CVSS 2.0 base score
7.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
20References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redirection restrictions via a crafted string.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

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

References

LinkTags
http://codex.wordpress.org/Version_3.6.1 Vendor Advisory
http://core.trac.wordpress.org/changeset/25323 ExploitPatch
http://core.trac.wordpress.org/changeset/25324 ExploitPatch
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116828.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116832.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/117118.html
http://seclists.org/fulldisclosure/2013/Dec/174
http://wordpress.org/news/2013/09/wordpress-3-6-1/ PatchVendor Advisory
http://www.debian.org/security/2013/dsa-2757
http://www.osvdb.org/101181
http://codex.wordpress.org/Version_3.6.1 Vendor Advisory
http://core.trac.wordpress.org/changeset/25323 ExploitPatch
http://core.trac.wordpress.org/changeset/25324 ExploitPatch
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116828.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116832.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/117118.html
http://seclists.org/fulldisclosure/2013/Dec/174
http://wordpress.org/news/2013/09/wordpress-3-6-1/ PatchVendor Advisory
http://www.debian.org/security/2013/dsa-2757
http://www.osvdb.org/101181

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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-2013-4339), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.