CVE-2025-11867: 
WordPress vulnerability analysis and mitigation

The Bg Book Publisher plugin for WordPress contains a Stored Cross-Site Scripting vulnerability (CVE-2025-11867) discovered on October 22, 2025. The vulnerability affects all versions up to and including 1.25, specifically in the book_author post meta functionality that is rendered through the [book_author] shortcode (NVD CVE).

The vulnerability stems from improper escaping of meta value output in the book_author post meta field. The issue is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The vulnerability 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 (NVD CVE).

When exploited, this 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 the compromised page, potentially leading to unauthorized data access or manipulation of user interactions (NVD CVE).

Users running affected versions of the Bg Book Publisher plugin (version 1.25 or earlier) should update to a patched version when available. In the meantime, it is recommended to restrict contributor access and carefully monitor user permissions to minimize potential exploitation (NVD CVE).