Movable Type 6.0.1, 5.2.9, and 5.161 Security Updates
In November the 15th, 2013, Six Apart released a mandatory security update for movable type v5x and v6x.
The security issue that was identified and fixed is related to the Rich Text Editor present in movable type v5 and v6 which was susceptible to cross-site scripting (XSS) attacks.
It is strongly recommended that all installations running movable type v5.x or v6.x are upgraded to the latest release. If you need another pair of hands for upgrading your movable type installation I'm available.
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