A wordpress security update has been released for Debian GNU/Linux 9 LTS to address several vulnerabilities.

DLA 2956-1: wordpress security update

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Debian LTS Advisory DLA-2956-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
March 20, 2022   https://wiki.debian.org/LTS
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Package : wordpress
Version : 4.7.23+dfsg-0+deb9u1
Debian Bug : 1007145

Several vulnerabilities like Prototype Pollution Vulnerability in a
jQuery dependency and in the block editor, and Stored Cross Site
Scripting Vulnerability were discovered in Wordpress, a web blogging
tool.

For Debian 9 stretch, this problem has been fixed in version
4.7.23+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/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