Beenu Arora has discovered two vulnerabilities in Mambo, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "Itemid" parameter in index.php (when "option" is set to "com_frontpage") and "option" in index.php (when "Itemid" is set to "1") 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.
Successful exploitation of both vulnerabilities requires that the target user runs a web browser that does not URL-encode the request (e.g. Internet Explorer 6).
The vulnerabilities are confirmed in versions 4.6.2 and 4.6.3. Other versions may also be affected.
Solution: Edit the source code to ensure that input is properly sanitised.
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Subject: Mambo Two Cross-Site Scripting Vulnerabilities
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