Unauthenticated options update in Rich Reviews plugin for WordPress

1) Improper access control

EUVDB-ID: #VU21334

Risk: High

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:H/RL:U/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 when processing data passed to the "/wp-admin/admin-post.php" URL. A remote non-authenticated attacker can bypass implemented security restrictions and execute arbitrary JavaScript code on the website.

Note: this vulnerability is being actively exploited in the wild.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Rich Reviews: 1.7.3 - 1.7.4

External links

http://wordpress.org/support/topic/plugin-not-supported-open-to-malware-uninstall-now/
http://www.wordfence.com/blog/2019/09/rich-reviews-plugin-vulnerability-exploited-in-the-wild/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.