CVE-2026-94166: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in UpSolution UpSolution Core

This vulnerability in UpSolution Core (versions up to 8.44) is caused by improper neutralization of input during web page generation, leading to reflected cross-site scripting (XSS). The flaw allows attackers to inject malicious scripts that are reflected back to users, potentially compromising confidentiality, integrity, and availability. 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, scope changed, and impacts on confidentiality, integrity, and availability.

Successful exploitation can lead to execution of arbitrary scripts in the victim's browser, potentially resulting in data theft, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of the affected system or user data.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should apply any recommended temporary mitigations from the vendor and exercise caution with untrusted input.