CVE-2005-4080: Horde Imp

Medium severity, CVSS 4.3. EPSS: 2.4% chance of exploitation in the next 30 days.

Horde IMP 4.0.4 and earlier does not sanitize strings containing UTF16 null characters, which allows remote attackers to conduct cross-site scripting (XSS) attacks via UTF16 encoded attachments and strings that will be executed when viewed using Internet Explorer, which ignores the characters.

Affected products

• Horde Imp: version 2.0 only; version 2.2 only; version 2.2.1 only; version 2.2.2 only; version 2.2.3 only; version 2.2.4 only; …

Published 2005-12-08. Last modified 2026-06-16.