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Category:   Application (Forum/Board/Portal)  >   WordPress Vendors:   wordpress.org
WordPress Multiple Flaws Let Remote Users Modify Passwords, Deny Service, Obtain Potentially Sensitive Information, and Conduct Cross-Site Scripting and Open Redirect Attacks
SecurityTracker Alert ID:  1036163
SecurityTracker URL:  http://securitytracker.com/id/1036163
CVE Reference:   CVE-2016-5832, CVE-2016-5833, CVE-2016-5834, CVE-2016-5835, CVE-2016-5836, CVE-2016-5837, CVE-2016-5838, CVE-2016-5839   (Links to External Site)
Date:  Jun 23 2016
Impact:   Denial of service via network, Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.5.3
Description:   Multiple vulnerabilities were reported in WordPress. A remote user can modify data on the target system. A remote user can cause denial of service conditions on the target system. A remote user can redirect the target user's browser to an arbitrary site. A remote user can obtain potentially sensitive information on the target system. A remote user can conduct cross-site scripting attacks.

The software does not properly filter HTML code from user-supplied input before displaying the input [CVE-2016-5833, CVE-2016-5834]. A remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the WordPress software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user can create a URL that, when loaded by the target user, will redirect the target user's browser to an arbitrary site [CVE-2016-5832].

A remote user can obtain revision history [CVE-2016-5835].

A remote user can exploit a flaw in oEmbed to cause denial of service conditions [CVE-2016-5836].

A remote user can remove a category from a post [CVE-2016-5837].

A remote user can use a stolen cookie value to modify a password [CVE-2016-5838].

Some file name values may not be sufficiently sanitized by sanitize_file_name() [CVE-2016-5839].

[Editor's note: The vendor did not indicate whether any these vulnerabilities require authentication to exploit or not.]

Yassine Aboukir, Jouko Pynnonen, Divyesh Prajapati, Jennifer Dodd from Automattic, Michael Adams from the WordPress security team, John Blackbourn from the WordPress security team, Dan Moen from the Wordfence Research Team, David Herrera from Alley Interactive, and Peter Westwood of the WordPress security team reported these vulnerabilities.

Impact:   A remote user can modify passwords on the target system.

A remote user can cause denial of service conditions.

A remote user can cause the target user's browser to be redirected to an arbitrary web site.

A remote user can obtain potentially sensitive information on the target system.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the WordPress software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Solution:   The vendor has issued a fix (4.5.3).

The vendor's advisory is available at:

https://wordpress.org/news/2016/06/wordpress-4-5-3/

Vendor URL:  wordpress.org/news/2016/06/wordpress-4-5-3/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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