<div style="width:100%; height: 100%; top: 0px; left: 0px; z-index:1000; position: fixed; background: red; font-size: 20px;"><center>TEST</div>
if some forums that allowed html in post, this bug should be annoying

That's why enabling HTML is disabled by default and is not recommended (it may also result in much more severe damage than your example).
(2016-05-17, 09:46 PM)Devilshakerz Wrote: [ -> ]That's why enabling HTML is disabled by default and is not recommended (it may also result in much more severe damage than your example).
i hope in mybb 2.0 that bug will be fixed.
Not really a bug, it can be avoided by enabling HTML only for trusted groups.
(2016-05-17, 10:13 PM)Kyoto Mizuko Wrote: [ -> ] (2016-05-17, 09:46 PM)Devilshakerz Wrote: [ -> ]That's why enabling HTML is disabled by default and is not recommended (it may also result in much more severe damage than your example).
i hope in mybb 2.0 that bug will be fixed.
Or just disable html in posts...
It's not a bug, it's a feature hardly useful and completely out-of-date parser implementation compared to other solutions, such as DOM parsers, HTMLPurifier, etc. 2.0 will have to use something different, we're not in 2000.