gscan2pdf-2.12.0/lib/Gscan2pdf/Document.pm refers to...
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ra28145
lib/Gscan2pdf/Document.pm of gscan2pdf-2.12.0 release contains this piece of code:
use lib qw(/home/jeff/dev/perl/Perl-PDF-Builder-myfork/lib);
This allows any jeff user to implant a back door. Please remove that line.
Good catch. Thanks for the report. I'll get an new release out ASAP.