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Developer(s)MH Sub I, LLC d/b/a vBulletin
Initial release2000; 19 years ago (2000)
Stable release5.4.5 (November 14, 2018; 2 months ago (2018-11-14)) [±]
Written inPHP
PlatformPHP, MySQL
TypeForum software
LicenseCommercial proprietary software[1]

vBulletin is a proprietary Internet forum software package sold by MH Sub I, LLC doing business as vBulletin. It is written in PHP and uses a MySQL database server. It competes commercially with XenForo, while competing free forum software includes WordPress, Joomla, Drupal, MyBB, and phpBB.


Internet Brands acquired the product from JelSoft in 2007.[2]

In July 2010 the BBC reported that there was a serious flaw in vBulletin software that allows anyone to easily access the database username and password.[3]

In October 2010, Internet Brands sued three former employees, just as their new competing software XenForo was to be launched.[2], as well as a second lawsuit in the United States claiming breach of contract, copyright infringement, and misappropriation of trade secrets.[4]. In May 2011 it was announced that vBulletin had abandoned an attempt at preventing XenForo doing business,[5] and in 2013 the claims were dismissed.

vBulletin 4 was released in late 2009. The StyleVars system was added to draw CSS variables directly from the vBulletin Template code.[6]

See also[edit]


  1. ^ "Software License Agreement for Downloaded Version". vBulletin. Retrieved 10 October 2018.
  2. ^ a b Metz, Cade. "vBulletin sues ex-devs over 'from scratch' competitor". The Register. Retrieved 10 October 2018.
  3. ^ Fildes, Jonathan (2010-07-22). "BBC News". British Broadcasting Corporation. Retrieved 2012-01-17.
  4. ^ Metz, Cade (2010-11-04). "Forumware giant vBulletin sues ex-devs (again)". The Register. Retrieved 2010-11-11.
  5. ^ Metz, Cade. "vBulletin abandons bid for injunction against ex-devs". The Register. Retrieved 10 October 2018.
  6. ^ "vBulletin Skins". TalkTemplate.com. Retrieved 2012-02-29.