CVE-2025-8897: 
WordPress vulnerability analysis and mitigation

The Beaver Builder – WordPress Page Builder plugin for WordPress (CVE-2025-8897) contains a Reflected Cross-Site Scripting vulnerability discovered on August 27, 2025. The vulnerability affects all versions up to and including 2.9.2.1, specifically through the 'fl_builder' parameter (NVD).

The vulnerability stems from insufficient input sanitization and output escaping in the plugin's handling of the 'fl_builder' parameter. The issue has been assigned a CVSS v3.1 Base Score of 6.1 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation) (NVD, Wordfence).

When exploited, this vulnerability allows unauthenticated attackers to inject arbitrary web scripts that execute when users perform specific actions, such as clicking on a malicious link. The impact is considered moderate, affecting both confidentiality and integrity with low severity, while availability remains unaffected (NVD).

A patch has been released in version 2.9.3.1 of the Beaver Builder plugin. Users are advised to update to this version or later to mitigate the vulnerability. The fix can be found in the trunk/includes/ui-iframe.php file (WordPress Plugin Repository).