FirstBlood-#239 — Attacker can register a user name that has already been registered
This report has been reviewed and accepted as a valid vulnerability on FirstBlood!
On 2021-05-14, xnl-h4ck3r reported:
You can register the same user more than once and get a new password, potentially taking over an existing account.
Steps to Reproduce
/register.php and regsiter a user, e.g. xnl:
An attacker can then fo to the site and go to
/register.php and use the same user name, and be assigned a new password. Register the name xnl with an invite code:
If a doctor has an existing account, and attacker can register an account with the same username and get a new password to log into that account.
This report has been publicly disclosed for everyone to view
FirstBlood ID: 17
Vulnerability Type: Auth issues
Unintended: An account with the same username can be created which leads to the original account being deleted and replaced with the attackers
Respect Earnt: 2000000
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