Cross-site Scripting (XSS) Affecting php-horde-text-filter package, versions <2.3.5-1+deb9u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

Exploit Maturity
Mature
EPSS
3.63% (92nd percentile)

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  • Snyk IDSNYK-DEBIAN9-PHPHORDETEXTFILTER-1074924
  • published14 Feb 2021
  • disclosed14 Feb 2021

Introduced: 14 Feb 2021

CVE-2021-26929  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Debian:9 php-horde-text-filter to version 2.3.5-1+deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php-horde-text-filter package and not the php-horde-text-filter package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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.

CVSS Scores

version 3.1