A htmlunit security update has been released for Debian GNU/Linux 9 LTS to address an issue with malicious JavaScript code was able to execute arbitrary Java code on the application.

DLA 2326-1: htmlunit security update

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Debian LTS Advisory DLA-2326-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/
August 15, 2020   https://wiki.debian.org/LTS
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Package : htmlunit
Version : 2.8-2+deb9u1
CVE ID : CVE-2020-5529

In HtmlUnit, a GUI-Less browser for Java programs, malicious JavaScript
code was able to execute arbitrary Java code on the application.

For Debian 9 stretch, this problem has been fixed in version
2.8-2+deb9u1.

We recommend that you upgrade your htmlunit packages.

For the detailed security status of htmlunit please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/htmlunit

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