WP Books Gallery <= 4.8.0 - Missing Authorization to Unauthenticated Settings Update via 'permalink_structure' Parameter
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Books Gallery – Book Showcase, Library & Affiliate Plugin | <= 4.8.0 | 4.8.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-862- Platform
- WordPress
- Package
Books Gallery – Book Showcase, Library & Affiliate Plugin- Disclosed
- 23.04.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 12bf1cd8-cd55-4771-b2bb-597797b1b949 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Books Gallery – Book Showcase, Library & Affiliate Plugin
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 03.2022 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 5
Disclosures per year
- 2022: 1
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 3
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WP Books Gallery <= 4.8.0 - Missing Authorization to Unauthenticated Settings Update via 'permalink_structure' Parameter this entry
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