WordPress Under Construction plugin <= 5.82 - Cross Site Scripting (XSS) vulnerability

Unauthenticated Cross Site Scripting (XSS) in Under Construction <= 5.82 versions.

underConstruction <= 1.18 - Reflected Cross-Site Scripting

The underConstruction plugin <= 1.18 for WordPress echoes out the raw value of `$GLOBALS['PHP_SELF']` in the ucOptions.php file. On certain configurations including Apache+modPHP, this makes it possible to use it to perform a reflected Cross-Site Scripting attack by injecting malicious code in the request path.

Cross-site request forgery (CSRF) vulnerability in the underConstruction plugin before 1.09 for WordPress allows remote attackers to hijack the authentication of administrators for requests that deactivate a plugin via unspecified vectors.

underConstruction < 1.21 - Admin+ Stored Cross-Site Scripting

The underConstruction WordPress plugin before 1.21 does not sanitise or escape the "Display a custom page using your own HTML" setting before outputting it, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiletred_html capability is disallowed.

underConstruction < 1.20 - Construction Mode Deactivation via CSRF

The underConstruction WordPress plugin before 1.20 does not have CSRF check in place when deactivating the construction mode, which could allow attackers to make a logged in admin perform such action via a CSRF attack