[原文]Multiple cross-site scripting (XSS) vulnerabilities in the RSS module in PostNuke 0.750 and 0.760RC2 and RC3 allow remote attackers to inject arbitrary web script or HTML via the (1) rss_url parameter to magpie_slashbox.php, or the url parameter to (2) magpie_simple.php or (3) magpie_debug.php.
PostNuke contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate the "rss_url" variable upon submission to the "magpie_slashbox.php" script. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Upgrade to version 0.750b or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.