The miniOrange OTP Login, Verification and SMS Notifications plugin for WordPress is vulnerable to…

Why it is Amber

• CVSS 9.8 critical
• Remotely exploitable without logging in

References

• https://plugins.trac.wordpress.org/browser/miniorange-otp-verification/tags/5.5.5/includes/js/loginform.js#L176
• https://plugins.trac.wordpress.org/browser/miniorange-otp-verification/tags/5.5.5/views/forms/mowploginform.php#L134
• https://plugins.trac.wordpress.org/changeset/3687601/miniorange-otp-verification
• https://www.wordfence.com/threat-intel/vulnerabilities/id/2895f0c2-41b6-4b11-9865-3bded4402aa9?source=cve

Original description

The miniOrange OTP Login, Verification and SMS Notifications plugin for WordPress is vulnerable to Authentication Bypass via the mo_wp_login_intent parameter in all versions up to, and including, 5.5.5. This is due to a missing password-intent guard in the skip_pass_fallback-enabled configuration branch of the mo_by_pass_login() function, which treats administrator role membership alone as sufficient authentication whenever the unauthenticated, unverified POST parameter mo_wp_login_intent is submitted with the value otp, causing mo_get_user() to skip wp_authenticate_username_password() and resolve a WP_User purely from a username lookup. This makes it possible for unauthenticated attackers to log in as any existing administrator account by supplying only a known username and an empty password alongside mo_wp_login_intent=otp, with no password or OTP verification required. Exploitation is conditional on a site administrator having simultaneously enabled the following plugin options: WP Login OTP, Login with Only OTP, Allow Users to Login with Username and Password, and Admin OTP Bypass.