Improper access control in Gutenberg & Elementor Templates Importer For Responsive plugin for WordPress

1) Improper access control

EUVDB-ID: #VU26224

Risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The vulnerability exists due to improper access restrictions in various AJAX actions (23). A remote authenticated attacker can bypass implemented security restrictions and reset site data, inject malicious JavaScript in pages, modify theme customizer data, import .xml and .json files and activate plugins, among many other actions.

Note: Majority of the vulnerable AJAX action were found in the "/class-responsive-ready-sites-importer.php" file.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Responsive Add Ons: 1.0.0 - 2.2.5

External links

http://wpvulndb.com/vulnerabilities/10137/
http://www.wordfence.com/blog/2020/03/severe-flaws-patched-in-responsive-ready-sites-importer-plugin/

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.