SS-2015-003: History XSS Vulnerability

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Severity:: Medium (?)
Identifier:: SS-2015-003
Versions Affected:: 3.1.9 and lower
Versions Fixed:: 3.1.10
Release Date:: 2015-02-19

A cross-site scripting vulnerability has been discovered in the CMS page history tab.

This vulnerability can only be exploited if a user with CMS access has posted malicious or unescaped HTML into any of the text fields on a page, and if the "compare mode" option is selected. The HTML will be embedded into the page unescaped.

This has been resolved by performing the text comparison in a HTML friendly way.

Reported by Hugh Davenport - All The Things Ltd