Source: php-horde-text-filter
Version: 2.3.6-7
Severity: grave
Tags: security upstream
X-Debbugs-Cc: car...@debian.org, Debian Security Team <t...@security.debian.org>
Control: found -1 2.3.5-3+deb10u1
Control: found -1 2.3.5-3

Hi,

The following vulnerability was published for php-horde-text-filter.

CVE-2021-26929[0]:
| An XSS issue was discovered in Horde Groupware Webmail Edition through
| 5.2.22 (where the Horde_Text_Filter library before 2.3.7 is used). The
| attacker can send a plain text e-mail message, with JavaScript encoded
| as a 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-26929
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26929
[1] https://lists.horde.org/archives/announce/2021/001298.html
[2] https://www.alexbirnberg.com/horde-xss.html
[3] 
https://github.com/horde/Text_Filter/commit/a2f67da064d7a91440b7a2448e56a6387ab94c67

Regards,
Salvatore

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