What the vulnerability does
01Description
The Bg Book Publisher plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `book_author` post meta, rendered through the `[book_author]` shortcode, in all versions up to, and including, 1.25. This is due to the plugin not properly escaping the meta value before output. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
BG Book Publisher versions up to 1.25 contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component itself. An attacker with low-level credentials can inject code that executes in other users' browsers, potentially compromising their sessions or data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers, potentially stealing session data or performing actions on their behalf.
Potential impact on your site
04Site Impact
Any authenticated user can inject code affecting other site users; compromises user sessions and data integrity across the site.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site; no user interaction required from the victim.
Key dates
06Disclosure timeline
October 22, 2025
CVE published
April 8, 2026
Record updated
