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CVE-2021-26929

Published: 14 February 2021

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.

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
php-horde-text-filter
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream
Released (2.3.7)
xenial Needed

Patches:
upstream: https://github.com/horde/Text_Filter/commit/a2f67da064d7a91440b7a2448e56a6387ab94c67

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N