XenForo 2.3.9 Released
Today we are releasing XenForo 2.3.9 to address some potential security vulnerabilities that were recently reported to us. This version only includes security fixes and any bug fixes we previously said would make it to 2.3.9 have now been delayed until 2.3.10.It is now available for all licensed customers to download. We strongly recommend that all customers running previous versions of XenForo 2.3 upgrade to this release to benefit from increased stability.
The issues identified are as follows:
- Prevention of a possible stored XSS (cross-site scripting) exploit related to BB code rendering (thank you to Antisocial)
- Prevention of a possible XSS exploit related to lightbox usage in posts (thank you UwU)
- Prevention of a possible RCE (remote code execution) exploit via authenticated, but malicious, admin users (thank you UwU)
We recommend doing a full upgrade to resolve the issue, but a patch can be applied manually. See below for further details.