CVE-2026-78273: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in WP Manage Ninja Fluent Boards Pro

This vulnerability (CWE-79) in Fluent Boards Pro (<= 2.0.11) allows subscriber-level users to perform cross-site scripting attacks by injecting malicious input that is not properly neutralized when generating web pages. The CVSS 3.1 score of 6.5 reflects network attack vector, low attack complexity, requiring privileges at the subscriber level, user interaction, and impacts on confidentiality, integrity, and availability at a low level. No patch or official remediation has been disclosed as of the publication date.

Successful exploitation can lead to execution of arbitrary scripts in the context of other users, potentially resulting in partial disclosure of information, modification of data, or disruption of service. The impact is limited by the requirement for subscriber privileges and user interaction.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting subscriber input or applying web application firewall rules to detect and block XSS payloads.