Horde Kronolith H3 2.1 before 2.1.7 and 2.2 before 2.2-RC2; Nag H3 2.1 before 2.1.4 and 2.2 before 2.2-RC2; Mnemo H3 2.1 before 2.1.2 and H3 2.2 before 2.2-RC2; Groupware 1.0 before 1.0.3 and 1.1 before 1.1-RC2; and Groupware Webmail Edition 1.0 before 1.0.4 and 1.1 before 1.1-RC2 does not validate ownership when performing share changes, which has unknown impact and attack vectors.

Multiple cross-site scripting (XSS) vulnerabilities in Horde Groupware, Groupware Webmail Edition, and Kronolith allow remote attackers to inject arbitrary web script or HTML via the timestamp parameter to (1) week.php, (2) workweek.php, and (3) day.php; and (4) the horde parameter in the PATHINFO to the default URI. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Multiple cross-site scripting (XSS) vulnerabilities in Horde Kronolith H3 before 2.0.6 allow remote authenticated users to inject arbitrary web script or HTML via (1) the Calendar name field when creating calendars, (2) event title field when deleting events, the (3) Category and (4) Location search fields, and the (5) attendees email address fields when editing event attendees, and possibly other vectors.