<s>
vBulletin	B-Protocol
is	O
a	O
proprietary	B-Application
Internet	B-Application
forum	I-Application
software	I-Application
package	O
sold	O
by	O
MH	O
Sub	O
I	O
,	O
LLC	O
doing	O
business	O
as	O
vBulletin	B-Protocol
(	O
formerly	O
Jelsoft	B-Protocol
Enterprises	I-Protocol
and	O
vBulletin	B-Protocol
Solutions	O
)	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
PHP	B-Application
and	O
uses	O
a	O
MariaDB	B-Application
or	O
MySQL	B-Application
database	O
server	O
.	O
</s>
<s>
Similar	O
products	O
include	O
XenForo	B-Protocol
,	O
WordPress	B-Application
,	O
Joomla	B-Protocol
,	O
Drupal	B-Application
,	O
MyBB	B-Language
,	O
and	O
phpBB	B-Application
.	O
</s>
<s>
vBulletin	B-Protocol
was	O
first	O
launched	O
in	O
2000	O
by	O
James	O
Limm	O
and	O
John	O
Percival	O
.	O
</s>
<s>
Its	O
successor	O
,	O
vBulletin	B-Protocol
2	O
,	O
was	O
released	O
in	O
2001	O
.	O
</s>
<s>
Internet	O
Brands	O
acquired	O
the	O
product	O
from	O
JelSoft	B-Protocol
in	O
2007	O
.	O
</s>
<s>
vBulletin	B-Protocol
4	O
was	O
released	O
in	O
late	O
2009	O
.	O
</s>
<s>
The	O
StyleVars	O
system	O
was	O
added	O
to	O
draw	O
CSS	O
variables	O
directly	O
from	O
the	O
vBulletin	B-Protocol
Template	O
code	O
.	O
</s>
<s>
In	O
July	O
2010	O
,	O
the	O
BBC	O
reported	O
that	O
there	O
was	O
a	O
serious	O
flaw	O
in	O
vBulletin	B-Protocol
software	O
that	O
allows	O
anyone	O
to	O
easily	O
access	O
the	O
database	O
username	O
and	O
password	O
.	O
</s>
<s>
In	O
October	O
2010	O
,	O
Internet	O
Brands	O
sued	O
three	O
former	O
employees	O
,	O
just	O
as	O
their	O
new	O
competing	O
software	O
XenForo	B-Protocol
was	O
to	O
be	O
launched	O
,	O
as	O
well	O
as	O
a	O
second	O
lawsuit	O
in	O
the	O
United	O
States	O
claiming	O
breach	O
of	O
contract	O
,	O
copyright	O
infringement	O
,	O
and	O
misappropriation	O
of	O
trade	O
secrets	O
.	O
</s>
<s>
In	O
May	O
2011	O
it	O
was	O
announced	O
that	O
vBulletin	B-Protocol
had	O
abandoned	O
an	O
attempt	O
at	O
preventing	O
XenForo	B-Protocol
doing	O
business	O
,	O
and	O
in	O
2013	O
the	O
claims	O
were	O
dismissed	O
.	O
</s>
<s>
vBulletin	B-Protocol
5	O
was	O
released	O
in	O
2012	O
.	O
</s>
<s>
In	O
late	O
2017	O
,	O
a	O
post	O
by	O
Technical	O
Support	O
Lead	O
,	O
Wayne	O
Luke	O
,	O
confirmed	O
that	O
vBulletin	B-Protocol
3	O
and	O
vBulletin	B-Protocol
4	O
were	O
now	O
considered	O
to	O
be	O
"	O
End	O
of	O
Life	O
"	O
software	O
,	O
with	O
no	O
further	O
development	O
of	O
the	O
series	O
planned	O
.	O
</s>
