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Vulnerability record · CVE-2009-3890 · published 17 November 2009

CVE-2009-3890: Wordpress code injection vulnerability

Wordpress · Wordpress

Unrestricted file upload vulnerability in the wp_check_filetype function in wp-includes/functions.php in WordPress before 2.8.6, when a certain configuration of the mod_mime module in the Apache HTTP Server is enabled, allows remote authenticated users to execute arbitrary code by posting an attachment with a multiple-extension filename, and then accessing this attachment via a direct request to a wp-content/uploads/ pathname, as demonstrated by a .php.jpg filename.

6.0 CVSS 2.0 Medium EPSS 8.4% · top 5.2% CWE-94 · Code injection
6.0CVSS 2.0 base score
8.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
20References
16 Jun 2026Last modified by NVD

Description

Unrestricted file upload vulnerability in the wp_check_filetype function in wp-includes/functions.php in WordPress before 2.8.6, when a certain configuration of the mod_mime module in the Apache HTTP Server is enabled, allows remote authenticated users to execute arbitrary code by posting an attachment with a multiple-extension filename, and then accessing this attachment via a direct request to a wp-content/uploads/ pathname, as demonstrated by a .php.jpg filename.

AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

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

References

LinkTags
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0142.html Broken Link
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0149.html Broken Link
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0153.html Broken Link
http://core.trac.wordpress.org/ticket/11122 Issue TrackingVendor Advisory
http://secunia.com/advisories/37332 Third Party Advisory
http://wordpress.org/development/2009/11/wordpress-2-8-6-security-release/ PatchVendor Advisory
http://www.openwall.com/lists/oss-security/2009/11/15/2 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/11/15/3 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/11/16/1 Mailing ListThird Party Advisory
http://www.osvdb.org/59958 Broken Link
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0142.html Broken Link
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0149.html Broken Link
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0153.html Broken Link
http://core.trac.wordpress.org/ticket/11122 Issue TrackingVendor Advisory
http://secunia.com/advisories/37332 Third Party Advisory
http://wordpress.org/development/2009/11/wordpress-2-8-6-security-release/ PatchVendor Advisory
http://www.openwall.com/lists/oss-security/2009/11/15/2 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/11/15/3 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/11/16/1 Mailing ListThird Party Advisory
http://www.osvdb.org/59958 Broken Link

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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-2009-3890), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.