CVE-2026-5347 | mhmrajib WP Books Gallery Plugin up to 4.8.0 on WordPress Setting admin_init permalink_structure authorization

VDB-359310 · CVE-2026-5347 · GCVE-0-2026-5347 MHMRAJIB WP BOOKS GALLERY PLUGIN UP TO 4.8.0 ON WORDPRESS SETTING ADMIN_INIT PERMALINK_STRUCTURE AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.2 $0-$5k 2.24 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. 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 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.2 VulDB Base Score: 7.3 VulDB Temp Score: 7.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.3 CNA Vector (Wordfence): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authorization CWE: CWE-862 / CWE-863 / CWE-285 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/01/2026 CVE reserved 04/24/2026 +23 days Advisory disclosed 04/24/2026 +0 days VulDB entry created 04/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Abhirup Konwar (Permalink) Status: Not defined CVE: CVE-2026-5347 (🔒) GCVE (CVE): GCVE-0-2026-5347 GCVE (VulDB): GCVE-100-359310 Entryinfo Created: 04/24/2026 08:01 Changes: 04/24/2026 08:01 (67) Complete: 🔍 Cache ID: 99:536:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸