TWiki 'MAKETEXT' variable Remote Command Execution Vulnerability

Summary
The host is running TWiki and is prone to remote command execution vulnerability.
Impact
Successful exploitation could allow attackers to execute shell commands by Perl backtick (``) operators. Impact Level: System/Application
Solution
Upgrade to TWiki-5.1.3 or later or apply patch, http://twiki.org/cgi-bin/view/Codev/SecurityAlert-CVE-2012-6329
Insight
flaw is due to improper validation of '%MAKETEXT{}%' Twiki variable (UserInterfaceInternationalisation is enabled) which is used to localize user interface content to a language of choice.
Affected
TWiki version 5.1.0 to 5.1.2, 5.0.x, 4.3.x, 4.2.x, 4.1.x, 4.0.x
References