ImmoSoft ImmoToolBox Connect versions up to 1.3.3 are affected by a reflected cross-site scripting (XSS) vulnerability due to improper input neutralization during web page generation. This allows attackers to craft malicious URLs or inputs that, when processed by the application, cause execution of arbitrary scripts in users' browsers. The vulnerability has a CVSS v3.1 base score of 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No patch or official remediation guidance has been provided by the vendor as of the published date.

Successful exploitation of this reflected XSS vulnerability could allow attackers to execute arbitrary scripts in the context of users' browsers, potentially leading to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of user data. The CVSS score of 7.1 indicates a high severity impact. However, no known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with untrusted input and consider implementing web application firewall (WAF) rules to detect and block reflected XSS attempts. Avoid clicking on suspicious links that may exploit this vulnerability.