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JGS-Portal for Woltlab Burning Board contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate the 'year' variable upon submission to the jgs_portal_beitraggraf.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.
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