A remote file inclusion vulnerability was reported in Joomla! core. It is possible for a remote attacker to extract a remotely hosted archive while you are extracting a backup archive or installing an update, depending on your server settings.
Affected versions: Versions: 2.5.4 through 2.5.25, 3.2.5 and earlier 3.x versions, 3.3.0 through 3.3.4.
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