johngg has already mentioned the possible issue, but it seems you did not notice. I would suggest that it would be safer to use a non-greedy quantifier: 
if ($data =~ m|<REDIRECTURL>(.*?)</REDIRECTURL>| ) {
print "Found: $1\n";
}

[download]
just in case there are two <REDIRECTURL>...</REDIRECTURL> pairs of tags (assuming this is possible).

In reply to Re^2: regex pattern matches by Laurent_R
in thread regex pattern matches by argos

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