This vulnerability in FAKTOR VIER's F4 Post Tree plugin (versions <= 1.1.18) involves improper neutralization of input during web page generation, resulting in reflected Cross-site Scripting (XSS). An attacker can craft malicious input that is reflected back to users without proper sanitization, enabling execution of arbitrary scripts in the victim's browser. The CVSS 3.1 base score is 7.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts to confidentiality, integrity, and availability.

Successful exploitation allows attackers to execute arbitrary scripts in the context of users visiting affected web pages, potentially leading to theft of sensitive information, session hijacking, or disruption of service. The reflected nature of the XSS requires user interaction. The overall impact affects confidentiality, integrity, and availability at a low level each.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying web application firewall (WAF) rules to detect and block reflected XSS payloads targeting this plugin. Avoid clicking on suspicious links that might exploit this vulnerability.