CVE-2018-14028 Information

Description

In WordPress 4.9.7 plugins uploaded via the admin area are not verified as being ZIP files. This allows for PHP files to be uploaded. Once a PHP file is uploaded the plugin extraction fails but the PHP file remains in a predictable wp-content/uploads location allowing for an attacker to then execute the file. This represents a security risk in limited scenarios where an attacker (who does have the required capabilities for plugin uploads) cannot simply place arbitrary PHP code into a valid plugin ZIP file and upload that plugin because a machine’s wp-content/plugins directory permissions were set up to block all new plugins.

CVSS Vector

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

Reference

http://www.securityfocus.com/bid/105060 https://core.trac.wordpress.org/ticket/44710 https://github.com/rastating/wordpress-exploit-framework/pull/52 https://rastating.github.io/unrestricted-file-upload-via-plugin-uploader-in-wordpress/

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.2