Vulnerability identifier: #VU23334

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Materialis
Web applications / Modules and components for CMS
Mesmerize
Web applications / Modules and components for CMS

Vendor: Extend Themes

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the "companion_disable_popup" function only checks the nonce and will pass two user input, $_POST['value'] and $_POST['option'], to the "update_option" function. A remote authenticated attacker can copy the nonce, use it to send an AJAX request and modify WordPress core options in the "wp_options" table.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Materialis: 0.9.29 - 1.0.172

Mesmerize: 0.1 - 1.6.89

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External links
http://blog.nintechnet.com/wordpress-mesmerize-and-materialis-themes-fixed-an-authenticated-options-change-vulnerability/

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Q & A

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.