WP Books Gallery <= 4.8.0 - Missing Authorization to Unauthenticated Settings Update via 'permalink_structure' Parameter
| CVE | CVE-2026-5347 |
|---|---|
| CVSS | 5.3 (Medium) |
| Publicly Published | April 23, 2026 |
| Last Updated | April 24, 2026 |
| Researcher |
Legion Hunter
|
Description
The HM Books Gallery plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 4.8.0. This is due to the absence of capability checks and nonce verification in the admin_init hook that handles the permalink settings update at line 205-209 of wp-books-gallery.php. The vulnerable code checks only for the presence of the 'permalink_structure' POST parameter before updating the 'wbg_cpt_slug' option, without verifying that the request comes from an authenticated administrator. This makes it possible for unauthenticated attackers to modify the custom post type slug for the books gallery, which changes the URL structure for all book entries and can break existing links and SEO rankings.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Books Gallery – Book Showcase, Library & Affiliate Plugin
| Software Type | Plugin |
|---|---|
| Software Slug | wp-books-gallery (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 4.8.1, or a newer patched version |
| Affected Version |
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| Patched Version |
|
Recent vulnerabilities in Books Gallery – Book Showcase, Library & Affiliate Plugin
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | Freemius <= 2.10.1 - Reflected DOM-Based Cross-Site Scripting via url Parameter | CVE-2024-13362 | Asaf Mozes | April 30, 2026 | |
| 2 | Freemius SDK <= 2.5.9 - Reflected Cross-Site Scripting via fs_request_get | CVE-2023-33999 | Rafie Muhammad | July 18, 2023 | |
| 3 | WordPress Books Gallery <= 4.4.8 - Cross-Site Request Forgery leading to Plugin Settings Changes | CVE-2023-23705 | yuyudhn | February 20, 2023 | |
| 4 | Freemius SDK <= 2.4.2 - Missing Authorization Checks | CVE-2022-4974 | March 4, 2022 |
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