Cross Site Scripting Vulnerability In CPAN WWW::Form Perl Module

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WWW::Form is a "simple and extendable module that allows developers to handle HTML form validation and display flexibly and consistently."

The WWW::Form module contains several bugs which opens the possibility for a cross site scripting attack.

Credit:
The information has been provided by Shlomi Fish

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Vulnerable Systems:
* WWW::Form version 1.12 and prior

Immune Systems:
* WWW::Form version 1.13

The CPAN WWW::Form contains sections of code that open the possibility for a cross-site-scripting attack. An excerpt from the latest vulnerable version is presented below:

1160:  my $inputHTML = "< input type='$field->{type}'"
1161:. " name='$fieldName' id='$fieldName' value='";
1162:
1163:  if ($field->{type} eq 'checkbox') {
1164:    $inputHTML .= $field->{defaultValue};
1165:  }
1166:  else {
1167:    $inputHTML .= $field->{value};
1168:  }

1314:  $textarea .= ">";
1315:
1316:  $textarea .= $field->{value};
1317:
1318:  $textarea .= "< /textarea>";

Patch Availability:
There is no patch available but upgrading to version 1.13 solves the problem.

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