Debian LTS: DLA-2306-1: libphp-phpmailer security update
Summary
The `Content-Type` and `Content-Disposition` headers could have
permitted file attachments that bypassed attachment filters which
match on filename extensions.
For Debian 9 stretch, this problem has been fixed in version
5.2.14+dfsg-2.3+deb9u2.
We recommend that you upgrade your libphp-phpmailer packages.
For the detailed security status of libphp-phpmailer please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libphp-phpmailer
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