Debian LTS: DLA-2731-1: wordpress security update
Summary
For Debian 9 stretch, this problem has been fixed in version
4.7.21+dfsg-0+deb9u1.
We recommend that you upgrade your wordpress packages.
For the detailed security status of wordpress please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/wordpress
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