I need some help regarding UseBB forum engine. I used UseBB 1.0.15 last time but recently I have updated to UseBB ver. 1.0.17 (development version) because of problems with security.
My forum has the setting user activation by email is enabled, but mail service is not installed on server side at all now (recently launched web service). So it should be impossible to pass registration now obviously.
By the way I already see several new users somehow created themselves with administrator privileges! All the users are in spam Internet catalogs:
How is it possible? Any ideas? I cannot see any useful info in server access logs. The problem is reproduced for UseBB ver. 1.0.15 and 1.0.17.