A libphp-phpmailer security update has been released for Debian GNU/Linux 8 LTS to address an escaping issue in libphp-phpmailer.

DLA 2244-1: libphp-phpmailer security update

Package : libphp-phpmailer
Version : 5.2.9+dfsg-2+deb8u6
CVE ID : CVE-2020-13625

It was discovered that there was an escaping issue in
libphp-phpmailer, an email generation utility class for the PHP
programming language.

The `Content-Type` and `Content-Disposition` headers could have
permitted file attachments that bypassed attachment filters which
match on filename extensions. For more information, please see the
following URL:

  https://github.com/PHPMailer/PHPMailer/security/advisories/GHSA-f7hx-fqxw-rvvj

For Debian 8 "Jessie", this issue has been fixed in libphp-phpmailer version
5.2.9+dfsg-2+deb8u6.

We recommend that you upgrade your libphp-phpmailer 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