Debian Security Advisory 1642-1 - Will Drewry discovered that the Horde, allows remote attackers to send an email with a crafted MIME attachment filename attribute to perform cross site scripting.
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Horde versions 3.2 through 3.2.1 suffer from a cross site scripting vulnerability due to the handling of MIME attachments.
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Two cross-site scripting (XSS) vulnerabilities were reported in Horde Framework. The first of which is that the Horde framework fails to properly sanitize the filename of MIME attachments on received emails. The second vulnerability has a wider impact. Horde relies on code similar to Popoon's externalinput.php to filter out potential XSS attacks on user-supplied input. This filter, and the original, fail to fully sanitize user data.
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