typo3 -- cross-site scripting and information disclosure

Secunia reports:

Some vulnerabilities have been reported in Typo3, which can be
exploited by malicious people to conduct cross-site scripting attacks
and disclose sensitive information.
Input passed via unspecified fields to the backend user interface
is not properly sanitised before being returned to the user. This can
be exploited to execute arbitrary HTML and script code in a user’s
browser session in context of an affected site.
An error in the “jumpUrl” mechanism can be exploited to read
arbitrary files from local resources by disclosing a hash secret used
to restrict file access.