Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NSquared Simply Schedule Appointments… (CVE-2026-110382)

CVE-2026-110382 describes a stored cross-site scripting (XSS) vulnerability in NSquared Simply Schedule Appointments, affecting versions up to and including 1.6.12.35. The vulnerability arises from improper neutralization of input during web page generation, enabling an attacker to inject malicious scripts that execute in users' browsers. The CVSS 3.1 base score is 7.1, indicating a 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 of this vulnerability can lead to execution of arbitrary scripts in the context of the victim's browser, potentially resulting in data theft, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability of affected users' data.

No patch or official fix information is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, users should apply standard XSS mitigations such as input validation and output encoding where possible, and consider limiting exposure to untrusted input.