Multiple vulnerabilities in Minimal Coming Soon & Maintenance Mode plugin for WordPress

Published: 2020-01-09

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-6167 CVE-2020-6168
CWE-ID	CWE-352 CWE-264
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Minimal Coming Soon & Maintenance Mode Web applications / Modules and components for CMS
Vendor	WebFactory Ltd

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site request forgery

EUVDB-ID: #VU24150

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6167

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

This vulnerability leads to Stored XSS and Settings Changes.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Minimal Coming Soon & Maintenance Mode: 0.1 - 2.10

External links

http://wpvulndb.com/vulnerabilities/10007/
http://www.wordfence.com/blog/2020/01/multiple-vulnerabilities-patched-in-minimal-coming-soon-maintenance-mode-coming-soon-page-plugin/

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?

No. We are not aware of malware exploiting this vulnerability.

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU24152

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-6168

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to improper permission check in the "is_admin()" function. A remote user can send a simple request to enable and disable maintenance mode on a vulnerable site.

PoC:

/wp-admin/admin.php?action=csmm_change_status&new_status=enabled&redirect=/wp-admin/

/wp-admin/admin.php?action=csmm_change_status&new_status=disabled&redirect=/wp-admin/