The API functionality of vBulletin 6 and 5.7.5 has been found to have security issues. We have created fixes for these issues.


To maintain site security, you should apply this patch as soon as possible. To do so, download the patch for your version from https://members.vbulletin.com/patches.php and follow these steps:

  1. Upload the files to your server. Overwriting the existing files with the new ones.
  2. Run the upgrade script (core/install/upgrade.php) that is included in the patch to rebuild your templates.



Note: If users report issues with Javascript, ask them to clear their browser cache.



Patches Released:
  • vBulletin 6.0.3 Patch Level 1
  • vBulletin 6.0.2 Patch Level 1
  • vBulletin 6.0.1 Patch Level 1
  • vBulletin 5.7.5 Patch Level 3


Important: If you are not using one of these versions of vBulletin, you will need to complete a full upgrade.


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