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Bug 41591: Prevent inline rendering of invoice files 

This patch forces download of invoice files rather than showing
them inline where they can potentially perform XSS

Test plan:
0. Apply the patch
1. koha-plack --restart kohadev
2. Find or create an active vendor
3. Create a basket if one doesn't already exist
4. Receive a shipment for the vendor
5. Create an invoice
6. Go to the invoice
7. In the URL change invoice.pl to invoice-files.pl
(or turn on AcqEnableFiles and go to it that way)
8. Upload an image file (e.g. SVG) or PDF
9. Click on the filename
10. Note that instead of displaying in the browser,
the file will be downloaded

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Wainui Witika-Park <wainuiwitikapark@catalyst.net.nz>
This commit is contained in:
David Cook 2026-01-12 01:49:11 +00:00 committed by Wainui Witika-Park
parent 16f058e0ab
commit 6c6467cfb5
No known key found for this signature in database
GPG Key ID: 2D0A6AB5DAF1B78D
2 changed files with 6 additions and 14 deletions
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18
acqui/invoice-files.pl
View File

@ -58,19 +58,11 @@ if ( $op eq 'download' ) {
my $fname = $file->{'file_name'};
my $ftype = $file->{'file_type'};
if ($input->param('view') && ($ftype =~ m|^image/|i || $fname =~ /\.pdf/i)) {
$fname =~ /\.pdf/i && do { $ftype='application/pdf'; };
print $input->header(
-type => $ftype,
-charset => 'utf-8'
);
} else {
print $input->header(
-type => $file->{'file_type'},
-charset => 'utf-8',
-attachment => $file->{'file_name'}
);
}
print $input->header(
-type => $file->{'file_type'},
-charset => 'utf-8',
-attachment => $file->{'file_name'}
);
print $file->{'file_content'};
}
else {

2
koha-tmpl/intranet-tmpl/prog/en/modules/acqui/invoice-files.tt
View File

@ -60,7 +60,7 @@
<tbody>
[% FOREACH f IN files %]
<tr>
<td><a href="?invoiceid=[% invoiceid | uri %]&amp;op=download&amp;view=1&amp;file_id=[% f.file_id | uri %]">[% f.file_name | html %]</a></td>
<td><a href="?invoiceid=[% invoiceid | uri %]&amp;op=download&amp;file_id=[% f.file_id | uri %]">[% f.file_name | html %]</a></td>
<td>[% f.file_type | html %]</td>
<td>[% f.file_description | html %]</td>
<td data-order="[% f.date_uploaded | html %]">