I recently ran into the same issue, of course while I was away from my home server so I didn’t have access to my wp-admin file.

I did the following to finally get back access.

I went to my website.

website.com/wp-login.php

it let me get to a page with username and password

(this was all done in chrome)

i used the developer tools to inspect to find this
<form name=“loginform” id=“loginform” action=“http://website.com/wp-login.php” method=“post”>
<p>
<label for=“user_login”>Username<br>
<input type=“text” name=“log” id=“user_login” class=“input” value=“” size=“20”></label>
</p>
<p>
<label for=“user_pass”>Password<br>
<input type=“password” name=“pwd” id=“user_pass” class=“input” value=“” size=“20”></label>
</p>
<p class=“forgetmenot”><label for=“rememberme”><input name=“rememberme” type=“checkbox” id=“rememberme” value=“forever”> Remember Me</label></p>
<p class=“submit”>
<input type=“submit” name=“wp-submit” id=“wp-submit” class=“button button-primary button-large” value=“Log In”>
<input type=“hidden” name=“redirect_to” value=“http://bareinhard.noip.me/wp-admin/”>
<input type=“hidden” name=“testcookie” value=“1”>
</p>
</form>

and additionally
<input type=“hidden” name=“redirect_to” value=“http://website.com/wp-admin/”>

you will then edit

value=“http://website.com/wp-admin/”>
action=“http://website.com/wp-login.php” method=“post”>

so that where it says website.com you change to what your actual url is.

then input your correct login information as well as password then click login without refreshing the page. If done correctly you will login to your dashboard and then from there you can change the wordpress url to the correct one under settings.

hope this helps people without access to there files

bareinhand: YOU ARE A LIFE SAVER. THANK YOU MY FRIEND.

Hello all.
I do not have any experience in website development or anything similar. For ignorance I changed the name of the site and now I do not have access to the admin. The site was not crafted by me and its creator still understands less than I do. I have no idea if they were backed up, much less how to back up.
I followed your instructions but still cannot enter the admin to correct the error, and i´m not sure I understand the part were you say;

and additionally
<input type=“hidden” name=“redirect_to” value=“http://website.com/wp-admin/”>

you will then edit

value=“http://website.com/wp-admin/”>
action=“http://website.com/wp-login.php” method=“post”>

I do undestand I´m supose to change the http://wrongsite.com to http://rightname.com, but not much more then that.

Could really use some help, please.