mhmrajib WP Books Gallery Plugin up to 4.8.0 on WordPress Setting admin_init permalink_structure authorization

Summaryinfo

A vulnerability classified as critical was found in mhmrajib WP Books Gallery Plugin up to 4.8.0 on WordPress. The affected element is the function admin_init of the component Setting Handler. The manipulation of the argument permalink_structure results in authorization. This vulnerability is known as CVE-2026-5347. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in mhmrajib WP Books Gallery Plugin up to 4.8.0 on WordPress. Affected is the function admin_init of the component Setting Handler. The manipulation of the argument permalink_structure with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was published by Abhirup Konwar (Permalink). The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-5347 since 04/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/24/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Photo Gallery Software

Vendor

• mhmrajib

Name

• WP Books Gallery Plugin

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8.0

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CPE 2.2info

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