GONICUS GOsa version before commit 56070d6289d47ba3f5918885954dcceb75606001 contains a Cross Site Scripting (XSS) vulnerability in change password form (html/password.php, #308) that can result in injection of arbitrary web script or HTML. This attack appear to be exploitable via the victim must open a specially crafted web page. This vulnerability appears to have been fixed in after commit 56070d6289d47ba3f5918885954dcceb75606001.
https://www.debian.org/security/2018/dsa-4239
https://lists.debian.org/debian-lts-announce/2018/07/msg00028.html
https://github.com/gosa-project/gosa-core/issues/14
https://github.com/gosa-project/gosa-core/commit/56070d6289d47ba3f5918885954dcceb75606001