I became aware of this via Bleeping Computer, but the manufacturer has now published a Foxit Security Bulletin with details. New version of Foxit PDF Reader and Foxit PhantomPDF were released last Friday, to fix 116 vulnerabilities, 18 alone were discovered by the Cisco Talos security researchers. Details about the respective vulnerabilities can also be found there. For some of the vulnerabilities, a visit to a website is enough to exploit them.
Foxit recommends updating the Foxit PDF Reader and Foxit PhantomPDF to version 9.3. The Foxit PDF Reader 9.3 can be downloaded here and the Foxit PhantomPDF here. It is strongly recommended that all users install this update.