A velocity-tools security update has been released for Debian GNU/Linux 9 LTS to address a cross-site scripting (XSS) vulnerability.

DLA 2597-1: velocity-tools security update

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Debian LTS Advisory DLA-2597-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Chris Lamb
March 17, 2021   https://wiki.debian.org/LTS
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Package : velocity-tools
Version : 2.0-6+deb9u1
CVE ID : CVE-2020-13959
Debian Bug : #985221

It was discovered that there was a cross-site scripting (XSS)
vulnerability in velocity-tools, a collection of useful tools for the
"Velocity" template engine.

The default error page could be exploited to steal session cookies,
perform requests in the name of the victim, used for phishing attacks
and many other similar attacks.

For Debian 9 "Stretch", this problem has been fixed in version
2.0-6+deb9u1.

We recommend that you upgrade your velocity-tools packages.

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

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