A okular security update has been released for both Debian GNU/Linux 8 LTS to address a security issue which allows code execution via an action link in a PDF document.

Package : okular
Version : 4:4.14.2-2+deb8u2
CVE ID : CVE-2020-9359
Debian Bug : 954891

Mickael Karatekin from Sysdream Labs discovered that the Okular
document viewer allows code execution via an action link in a PDF
document.

For Debian 8 "Jessie", this problem has been fixed in version
4:4.14.2-2+deb8u2.

We recommend that you upgrade your okular packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS