A flaw in the reset token validation mechanism allows for non-validating tokens to be forged.
This will allow an unauthenticated, unauthorized user to reset the password of the first
enabled user (lowest id). Typically, this is an administrator user. Note, that changing the
first users username may lessen the impact of this exploit (since the person who changed the
password does not know the login associated with the new password). However, the only way to
completely rectify the issue is to upgrade to 1.5.6 (or patch the
On a related issue, this has made me think of how I set up Joomla sites in the future. You might want to follow these steps:
- Install Joomla et al
- Create a few users
- Create a new super admin with a user name other than "admin"
- Delete the original "admin" user created on installation
I claim no security expertise… but taking these steps might slow them down a little!