This vulnerability (CVE-2026-25435) affects the wpdevart Booking calendar, Appointment Booking System plugin through version 3.2.36. It is a stored cross-site scripting (XSS) flaw caused by improper input neutralization during web page generation. An attacker can inject malicious scripts that persist in the system and execute when other users access the affected pages. The CVSS v3.1 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability with scope changed.

Successful exploitation of this stored XSS vulnerability can allow an attacker to execute arbitrary scripts in the context of other users, potentially leading to theft of user credentials, session hijacking, or other malicious actions affecting confidentiality, integrity, and availability of the affected system. The CVSS score of 7.1 reflects these impacts. There are no known exploits in the wild as of the published date.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor the vendor's communications for updates. Until a fix is available, consider restricting access to the affected plugin or disabling it if feasible to reduce risk.