EGroupware is a Web based groupware server written in PHP. A SQL Injection vulnerability exists in the core components of EGroupware prior to versions 23.1.20260113 and 26.0.20260113, specifically in the `Nextmatch` filter processing. The flaw allows authenticated attackers to inject arbitrary SQL commands into the `WHERE` clause of database queries. This is achieved by exploiting a PHP type juggling issue where JSON decoding converts numeric strings into integers, bypassing the `is_int()` security check used by the application. Versions 23.1.20260113 and 26.0.20260113 patch the vulnerability.
An issue was discovered in eGroupWare 17.1.20190111. A cross-site scripting Reflected (XSS) vulnerability exists in calendar/freebusy.php, which allows unauthenticated remote attackers to inject arbitrary web script or HTML into the "user" HTTP/GET parameter, which reflects its input without sanitization.
An issue was discovered in eGroupWare 17.1.20190111. A User Enumeration vulnerability exists under calendar/freebusy.php, which allows unauthenticated remote attackers to enumerate the users of web applications based on server response.
EGroupware before 23.1.20240624 mishandles an ORDER BY clause. This leads to json.php?menuaction=EGroupware\Api\Etemplate\Widget\Nextmatch::ajax_get_rows sort.id SQL injection by authenticated users for Address Book or InfoLog sorting.