SB2020010904 - Multiple vulnerabilities in Minimal Coming Soon & Maintenance Mode plugin for WordPress

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site request forgery (CVE-ID: CVE-2020-6167)

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.

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-6168)

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/

Remediation

Install update from vendor's website.

References

• https://wpvulndb.com/vulnerabilities/10007/
• https://www.wordfence.com/blog/2020/01/multiple-vulnerabilities-patched-in-minimal-coming-soon-maintenance-mode-coming-soon-page-plugin/
• https://wpvulndb.com/vulnerabilities/10008/