The vulnerability identified as CVE-2025-24559 affects the brandtoss WP Mailster WordPress plugin, specifically versions up to 1.8.15.0. It is a reflected cross-site scripting (XSS) issue caused by improper neutralization of user input during web page generation. This flaw allows an attacker to inject malicious scripts that could be executed in the context of a victim's browser session. 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, and impacts on confidentiality, integrity, and availability. There is no vendor advisory or patch link provided, and no known exploits have been reported.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected user's browser session. This can lead to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability as indicated by the CVSS vector. Since it is a reflected XSS, the attack requires user interaction (e.g., clicking a crafted link). No known active exploitation has been reported.

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 patch is available, consider applying temporary mitigations such as input validation or disabling the affected plugin if feasible.