A dompurify.js security update has been released for Debian GNU/Linux 9 LTS to address two issues.

DLA 2419-1: dompurify.js security update

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Debian LTS Advisory DLA-2419-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
October 29, 2020   https://wiki.debian.org/LTS
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Package : dompurify.js
Version : 0.8.2~dfsg1-1+deb9u1
CVE ID : CVE-2019-16728 CVE-2020-26870

Two issues have been found in dompurify.js, an XSS sanitizer for HTML,
MathML and SVG.
Both issues are related to mXSS issues in SVG- or MATH-elements.

For Debian 9 stretch, these problems have been fixed in version
0.8.2~dfsg1-1+deb9u1.

We recommend that you upgrade your dompurify.js packages.

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

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