Steam password exploit discovered
Until recently it was possible to access someone's steam account with only a username. Basically, the authentification process needed to change an account password could be bypassed by... simply ignoring it.
Clicking "continue" without entering the password change verification code offered express access to the user's account. That means if someone had your username (and were aware of the exploit) they could have accessed your account in a few clicks.
Kotaku got in touch with Valve about the issue – which was discovered and fixed last week – and this is how they responded:
To protect users, we are resetting passwords on accounts with suspicious password changes during that period or may have otherwise been affected. Relevant users will receive an email with a new password. Once that email is received, it is recommended that users login to their account via the Steam client and set a new password.
Please note that while an account password was potentially modified during this period the password itself was not revealed. Also, if Steam Guard was enabled, the account was protected from unauthorized logins even if the password was modified. We apologize for any inconvenience.
If you've received an email from Steam at the weekend requesting a password change – that's why. if you look at the video below, you'll be baffled as to how simple this exploit was.
Chuck Norris
Posts: 2537
Joined: 2012-02-06
After seeing the video and how simple it was to take advantage of such a grotesque flaw, i don´t know if i should laugh or cry really. I´m speachless.

Junior Member
Posts: 11
Joined: 2012-02-07
Glad to see that Steam Guard at least prevented unauthorized logins. This is just another reason to always use two-factor authentication if the option is given to you. If you don't have Steam Guard set up I would suggest enabling it on your account.
Senior Member
Posts: 8887
Joined: 2010-08-28
Good thing there was a crappy quality video, cuz didn't understand half of what he said...
Senior Member
Posts: 812
Joined: 2008-06-15
Always amazed when I read about this kind of thing. Steam goes to all sorts of trouble and expense to secure the system and... doesn't test to see if you can bypass security just by clicking?! Really?