FluxBB is fast, light, user-friendly forum software for your website.

FluxBB is designed as a lighter, faster alternative to some of the traditional feature heavy forum applications. It is easy to use and has a proven track record of stability and security making it an ideal choice of forum for your website.


  • Supports PHP4 & PHP5
  • Easy installation and setup
  • Open-source (GNU General Public Licence)
  • Clean admin interface
  • Flexible permission system
  • Lots of community modifications

[ Full feature list ] [ Tour of FluxBB v1.5.7 ]

Get FluxBB

The current stable release is FluxBB v1.5.7.

Security fixes!

Today we inform you about the release of two new FluxBB versions - v1.5.7 and v1.4.13.

These releases fix a critical security vulnerability that could potentially allow clever attackers to take over other user accounts on a FluxBB forum.
We also fixed another less severe issue related to redirects in login.php.

To keep the release (and accompanying patches small), we pushed back the planned and already implemented improvements to a v1.5.8 release due in November.

We want to thank everyone at ramhost.us for the very responsible disclosure of the vulnerability as well as their friendly communication. Patches were contributed by adaur and quy. Thanks, guys!

Please update your forums as soon as possible! As always, you can find complete download packages on the downloads page. Patches and changed files can be obtained on the upgrade page.

We apologize for the inconvenience and assure you that we are trying our best to avoid problems like these, now and in the future.

Security mailing list

In the days prior to this release, we have contacted several prominent community members and large FluxBB forums to give them time to patch their installs. To keep you all in the loop, we have created a new security mailing list. We will use that exclusively to contact you in case of security-relevant releases. You can sign up through a single click of a button in your site profile. Please consider doing so to stay informed and keep your forums up-to-date.