Re:Security Flaws in Adobe Acrobat Reader Allow Gaining Root...
by rspeed on Friday May 15, 2020 @12:31AM
(#23188914)
It's because of this. Adobe hates us.
https://en.wikipedia.org/wiki/XFA
Further reading: https://eclecticlight.co/2019/06/18/pdf-without-adobe-23-the...
Worse many "office" people which create PDF's with form fields use Adobe tools, so they never see that what they hand out to thousends of students isn't working with >90% of PDF viewers....