Alex Birnberg discovered a cross-site scripting (XSS) vulnerability in
the Horde Application Framework, more precisely its Text Filter API.
An attacker could take control of a user's mailbox by sending a
An XSS issue was discovered in Horde Groupware Webmail Edition
(where the Horde_Text_Filter library is used). The attacker can
link or email that is mishandled by preProcess in Text2html.php,
because bespoke use of \x00\x00\x00 and \x01\x01\x01 interferes
with XSS defenses.
For Debian 9 stretch, this problem has been fixed in version
We recommend that you upgrade your php-horde-text-filter packages.
For the detailed security status of php-horde-text-filter please refer to
its security tracker page at:
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
Debian LTS Advisory DLA-2564-1 [email protected]
https://www.debian.org/lts/security/ Sylvain Beucler
February 18, 2021 https://wiki.debian.org/LTS
Version : 2.3.5-1+deb9u1