WP Books Gallery <= 4.8.0 - Missing Authorization to Unauthenticated Settings Update via 'permalink_structure' Parameter

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Summary

CVECVE-2026-5347
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 06:16:04 UTC
Updated2026-04-24 06:16:04 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mhmrajib WP Books Gallery Build Stunning Book Showcases Libraries In Minutes affected 4.8.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/wp-books-gallery/tags/4.7.8/wp-books-gallery.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/12bf1cd8-cd55-4771-b2bb-59779... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/wp-books-gallery/trunk/wp-books-gallery.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-books-gallery/tags/4.7.8/wp-books-gallery.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-books-gallery/trunk/wp-books-gallery.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-books-gallery/tags/4.8.1/wp-books-gallery.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Abhirup Konwar (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-03T01:31:01.000ZVendor Notified
CNA2026-04-23T16:45:59.000ZDisclosed
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