Some vulnerabilities have been reported in TWiki, which can be exploited by malicious people to conduct cross-site scripting attacks or compromise a vulnerable system.
1) Input passed to the "URLPARAM" TWiki variable 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.
2) Input passed to the "SEARCH" parameter is not properly sanitised before being used in an "eval()" call. This can be exploited to inject and execute commands via specially crafted HTTP GET requests containing the backtick operator.
Solution: Update to version 4.2.4.
Provided and/or discovered by: The vendor credits:
1) Marc Schoenefeld and TWiki:Main.SteveMilner of Red Hat Security Response Team
2) Peter Allor, IBM Internet Security Systems
Original Advisory: 1) http://twiki.org/cgi-bin/view/Codev/SecurityAlert-CVE-2008-5304
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Subject: TWiki Cross-Site Scripting and Command Injection Vulnerabilities
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