CMP WordPress plugin vulnerabilities

The CMP WordPress plugin before version 4.1.18 does not sanitise and escape a settings value before outputting it on the coming-soon page, allowing users with the Editor role (when the administrator has granted the Editor role access to the CMP plugin's admin-bar controls) to inject arbitrary web scripts that execute when a visitor views the page.

The CMP WordPress plugin before version 4.1.18 does not enforce an option-name allow-list when importing settings via one of its AJAX actions, allowing users with the Editor role (when the administrator has granted the Editor role access to the CMP plugin's admin-bar controls) to update arbitrary WordPress options, including options that lead to privilege escalation to Administrator.

The CMP WordPress plugin before version 4.1.18 does not perform authorization checks on one of its AJAX actions and relies on a nonce that is skipped for certain (and exposed to anonymous visitors on others), allowing unauthenticated attackers to disable the site's maintenance/coming-soon mode under a non-default countdown configuration.