Navigate to a site with mod_customcert v3.10 (2020110900) installed and enabled
Go to any course, add a Custom Certificate activity. Leave at default settings
Click on 'View certificate' to inspect the document generated (it doesn't matter if the certificate is blank)
Observe that when document is previewed or downloaded and viewed within a web browser, mousing over the bottom left of the document will reveal an invisible and clickable link to tcpdf.org:
Business and training clients using Moodle and this plugin have raised concern with this data being present in official certifications and transactional documentation.
PDF documents handled by the TCPDF PHP class embed a hidden watermark link into the bottom left corner of generated documents by default.
Some explanations of the various observations with this issue alongside some ad-hoc fixes are listed at http://kreativschmiede.blogspot.com/2010/12/tcpdf-getting-rid-of-hidden-credit-link.html and https://github.com/tecnickcom/TCPDF/issues/292
STEPS TO REPLICATE:
Navigate to a site with mod_customcert v3.10 (2020110900) installed and enabled
Go to any course, add a Custom Certificate activity. Leave at default settings
Click on 'View certificate' to inspect the document generated (it doesn't matter if the certificate is blank)
Observe that when document is previewed or downloaded and viewed within a web browser, mousing over the bottom left of the document will reveal an invisible and clickable link to tcpdf.org:
Business and training clients using Moodle and this plugin have raised concern with this data being present in official certifications and transactional documentation.