Vulnerability identifier: #VU34057
Vulnerability risk: Medium
Exploitation vector: Network
Exploit availability: No
Vendor: Facebook Inc.
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the "wp_ajax_update_options" AJAX action. A remote authenticated attacker can send a request to update the options and hook-up their own Facebook Messenger account.
Install updates from vendor's website.
Vulnerable software versions
The Official Facebook Chat Plugin: 1.0 - 1.5
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.