If you are still running PivotX 2.2.6, you might be vulnerable to a security exploit, that was patched previously. Version 2.3.0 doesn't have this issue, but any older version of PivotX might be vulnerable. To fix this, you should do one of the following:
- Either update your old installs to PivotX 2.3.0
- or just replace the faulty timthumb.php. Download timthumb_2011-10-14.zip, extract it, and replace the file timthumb.php in pivotx/includes/
We're close to releasing PivotX 2.3.2, so if you're planning to wait for that release, just replace your existing timthumb.php with the version linked above.
For more information about security issues / patches, see the page dedicated to Security issues.