CVE-2025-11829
WordPress vulnerability analysis and mitigation

Overview

The Five9 Live Chat plugin for WordPress contains a Stored Cross-Site Scripting vulnerability (CVE-2025-11829) discovered in all versions up to and including 1.1.2. The vulnerability was disclosed on November 10, 2025, and affects the 'toolbar' attribute of the [five9-chat] shortcode. This security issue stems from insufficient input sanitization and output escaping in the plugin (NVD).

Technical details

The vulnerability is classified as a Stored Cross-Site Scripting (XSS) issue, identified as CWE-79 (Improper Neutralization of Input During Web Page Generation). It has received a CVSS v3.1 base score of 6.4 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. The technical root cause is traced to inadequate sanitization of the 'toolbar' attribute in the [five9-chat] shortcode implementation (Wordfence).

Impact

The vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages. These malicious scripts will execute whenever a user accesses an affected page, potentially compromising the security of site visitors (NVD).

Additional resources


SourceThis report was generated using AI

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