A moderately critical security advisory has been posted here: http://secunia.com/advisories/13718/
Methods to fix this issue are described here: http://forums.b2evolution.net/viewtopic.php?t=2695
We are encouraging all b2evo users to update their installation.
but there’s no NEW security risk, it’s only the old one from january, right?
Nope, there seems to be a more recent one - see my blog post about the exploit.
your posting is very unspecific.