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Insecure Library Loading
Moderately critical

WordPress Custom Field PHP Script Upload

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Release Date:  2007-06-26    Last Update:  2007-07-11    Views:  18,517

Secunia Advisory SA25794

Where:

From remote

Impact:

Security Bypass, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Alexander Concha has discovered a vulnerability in WordPress and WordPress MU, which can be exploited by malicious users to bypass certain security restrictions and to compromise a vulnerable system.

The vulnerability is caused due to improper authentication verification. This can be exploited to add the custom field "_wp_attached_file" to a post, upload a PHP script to an arbitrary path with wp-app.php or app.php, and execute arbitrary PHP code.

Successful exploitation requires valid Editor credentials and that the system is configured to allow uploads.

The vulnerability is confirmed in WordPress 2.2 and reported in WordPress MU 1.2.2. Prior versions may also be affected.


Solution:
Update to WordPress 2.2.1 or WordPress MU 1.2.3.

Provided and/or discovered by:
Alexander Concha

Original Advisory:
http://www.buayacorp.com/files/wordpress/wordpress-advisory.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: WordPress Custom Field PHP Script Upload

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