A prosody-modules security update has been released for both Debian GNU/Linux 9 and 10 to address an issue where the Prosody Jabber/XMPP server incorrectly validated the XMPP address when checking whether a user has admin access.

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Debian Security Advisory DSA-4612-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
January 31, 2020   https://www.debian.org/security/faq
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Package : prosody-modules
CVE ID : CVE-2020-8086

It was discovered that the LDAP authentication modules for the Prosody
Jabber/XMPP server incorrectly validated the XMPP address when checking
whether a user has admin access.

For the oldstable distribution (stretch), this problem has been fixed
in version 0.0~hg20170123.3ed504b944e5+dfsg-1+deb9u1.

For the stable distribution (buster), this problem has been fixed in
version 0.0~hg20190203.b54e98d5c4a1+dfsg-1+deb10u1.

We recommend that you upgrade your prosody-modules packages.

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/