in reply to
Doubt in perl taint
Perl Taint the use of a potentially "unsafe" operation to be illegal. Potentially "unsafe" operations are operations that have a potentially permanent destructive effect if the wrong parameters are passed.
Potentially unsafe operations include, but are not necessarily limited to, system calls of any sort such as using system(), backticks or piped open() calls, open calls that can write to disk, unlink() which deletes files, and rename().
Kindly refer the following url for more,