Title: User authentication failed: Unknown
Last modified: April 7, 2018

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# User authentication failed: Unknown

 *  Resolved [raystan](https://wordpress.org/support/users/raystan/)
 * (@raystan)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/)
 * Since I installed the plugin I have been getting notifications from Sucuri when
   I access the wp-login page.
 * Sucuri sends a message – User authentication failed: Unknown
 * I’m not sure if it is a Sucuri issue or this plugin but I just wanted to let 
   you know.
 * I opened a ticket with Sucuri also.
 * Thanks

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Author [Robert Peake](https://wordpress.org/support/users/robertpeake/)
 * (@robertpeake)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/#post-10156594)
 * HI [@raystan](https://wordpress.org/support/users/raystan/) — is authentication
   actually failing (i.e. you can’t log in) or is it just generating this (incorrect)
   error message?
 *  Thread Starter [raystan](https://wordpress.org/support/users/raystan/)
 * (@raystan)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/#post-10156613)
 * I can login no problem. Sucuri is just generating the User authentication failed:
   Unknown message.
 * They replied with the following:
 * When the plugin reports a failed or successful login, it does so because WordPress
   triggered the “wp_login” or “wp_login_failed” action respectively. There must
   be something else going on in your environment that is causing the trigger to
   run, notice that it also says “Unknown” where the plugin should report your username,
   meaning that WordPress is actually missing the metadata for the account when 
   passing the login attempt to the plugin.
 *  Plugin Author [Robert Peake](https://wordpress.org/support/users/robertpeake/)
 * (@robertpeake)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/#post-10156686)
 * The plugin does not trigger the wp_login_failed action directly, however it uses
   the standard WordPress signalling to generate a failure notice when someone attempts
   a login without checking the reCaptcha or if the reCaptcha is invalid.
 * Is it possible that, since using the plugin, these failure notices are coming
   from automated login attempts that are being blocked by the reCaptcha? Or is 
   there always a one-to-one correlation with your own (successful) logins?
 *  Plugin Author [Robert Peake](https://wordpress.org/support/users/robertpeake/)
 * (@robertpeake)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/#post-10159333)
 * Hi [@raystan](https://wordpress.org/support/users/raystan/) — any further thoughts
   on this?
 *  Thread Starter [raystan](https://wordpress.org/support/users/raystan/)
 * (@raystan)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/#post-10159889)
 * There is a one to one correlation.
 * When I access the login page, the Unknown error is generated. If I keep refreshing
   the login page without entering anything I get the error each time. When I enter
   my login and password and click the reCaptcha I get a login successful message.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘User authentication failed: Unknown’ is closed to new replies.

 * ![](https://ps.w.org/login-recaptcha/assets/icon-256x256.png?rev=1137538)
 * [Login No Captcha reCAPTCHA](https://wordpress.org/plugins/login-recaptcha/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/login-recaptcha/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/login-recaptcha/reviews/)

 * 5 replies
 * 2 participants
 * Last reply from: [raystan](https://wordpress.org/support/users/raystan/)
 * Last activity: [8 years, 1 month ago](https://wordpress.org/support/topic/user-authentication-failed-unknown/#post-10159889)
 * Status: resolved