This vulnerability in WP Fast Total Search arises from improper input sanitization leading to stored cross-site scripting (CWE-79). An attacker with low privileges can inject malicious scripts that are stored and later executed in the context of other users, potentially leading to partial compromise of confidentiality, integrity, and availability. The vulnerability affects all versions up to 1.59.211. No vendor advisory or patch is currently available, and no known exploitation has been reported.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of affected users, potentially leading to data disclosure, modification, or disruption of service. The CVSS vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with partial impact on confidentiality, integrity, and availability. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider limiting privileges of users who can input data into the plugin and monitor for suspicious activity related to the plugin. Avoid exposing the plugin to untrusted users where possible.