CVE-2021-26929

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.

Affected products

Horde Groupware Webmail Edition, Horde Text Filter

Horde Groupware

≤ 5.2.22

Fix

Available

CVSS 3.1

6.1 MEDIUM

EPSS

4.9% (92th percentile)

Weakness

CWE-79

NVD status

Modified

Published

2021-02-14