Some vulnerabilities have been discovered in FreeSchool, which can be exploited by malicious people to conduct cross-site scripting attacks and compromise a vulnerable system.
1) Input passed to the "CLASSPATH" parameter in various scripts (e.g. biblioteca/bib_form.php, biblioteca/edi_form.php, calendario/cal_insert.php, odulistica/mdl_save.php, and other scripts) is not properly verified before being used to include files. This can be exploited to include arbitrary files from local or external resources.
2) Input passed via the "key_words" parameter to biblioteca/index.php (when "action" is set to "bib_searchs" and "method" is set to "searchs") 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.
The vulnerabilities are confirmed in version 1.1.0.
Solution: Edit the source code to ensure that input is properly verified.
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Subject: FreeSchool File Inclusion and Cross-Site Scripting Vulnerabilities
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