Vulnerability identifier: #VU29188

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme
Web applications / Modules and components for CMS

Vendor: King-Theme

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the "kc_push_section" AJAX action in the "kingcomposer/includes/kc.ajax.php" script. A remote authenticated attacker can bypass implemented security restrictions and modify the content of any page or post on the website.

The new content can either replace the existing one ($_POST['overwrite']) or be appended to it.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme: 2.0.0 - 2.9.2

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External links
http://wpvulndb.com/vulnerabilities/10270/
http://blog.nintechnet.com/wordpress-kingcomposer-page-builder-fixed-multiple-critical-vulnerabilities/

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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.