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Vulnerability record · CVE-2013-4338 · published 12 September 2013

CVE-2013-4338: Wordpress code injection vulnerability

Wordpress · Wordpress

wp-includes/functions.php in WordPress before 3.6.1 does not properly determine whether data has been serialized, which allows remote attackers to execute arbitrary code by triggering erroneous PHP unserialize operations.

7.5 CVSS 2.0 High EPSS 8.7% · top 5.0% CWE-94 · Code injection
7.5CVSS 2.0 base score
8.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

wp-includes/functions.php in WordPress before 3.6.1 does not properly determine whether data has been serialized, which allows remote attackers to execute arbitrary code by triggering erroneous PHP unserialize operations.

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/25325 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://wordpress.org/news/2013/09/wordpress-3-6-1/ PatchVendor Advisory
http://www.debian.org/security/2013/dsa-2757
http://codex.wordpress.org/Version_3.6.1 Vendor Advisory
http://core.trac.wordpress.org/changeset/25325 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://wordpress.org/news/2013/09/wordpress-3-6-1/ PatchVendor Advisory
http://www.debian.org/security/2013/dsa-2757

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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-2013-4338), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.