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Sofia

XenForo 2.0.9 Released (Security Fix) Upgrade

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XenForo 2.0.9 fixes a flaw that could potentially be exploited to create a cross-site scripting vulnerability. We recommend that all customers running XenForo 2.0 upgrade to 2.0.9 or use the attached patch file as soon as possible. Note that if you are applying the patch rather than doing a full upgrade to 2.0.9, you will need to apply the 2.0.8 patch too.

XenForo extends thanks to Thomas Schneider for identifying the issue.

The issue is a XSS vulnerability. XSS (Cross Site Scripting) issues allow scripts and malicious HTML to be injected into the page, potentially allowing data theft or unauthenticated access.

Applying a Fix: Upgrading

You may upgrade to 2.0.9 to fix this issue. You should upgrade as you would to any other release.

Applying a Fix: Patching

Alternatively, this issue can be fixed by applying the patch in the attached file. You should simply overwrite the following file with the version attached to this message:
  • src/XF/Template/Templater.php
The file can be found at the same path within the attachment.
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