Topic: PunBB 1.2.21
A new security bug was reported for the latest 1.2 revision: a user could subscribe to the forums he didn't have a permission to read (if one knew the forum ID).
This bug is fixed and PunBB 1.2.21 is released. It is recommended that you update your PunBB 1.2.* installation.
Thanks to Smartys for report.