phpbb/phpbb3 — pull request #701 by sadu (2012-04-03 16:47:49+00:00)
Title: [ticket/10561] All users can choose deactivated styles (fixed).

A form exploit enabled the users to select a deactivated
style. Fixed with extra check on submit, with a new function
styles_verify to check if the selected style is activated or not.

PHPBB3-10561