Is CVE-2026-5347 actively exploited?

No active exploitation of CVE-2026-5347 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5347 be exploited remotely?

Yes. CVE-2026-5347 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5347?

CVE-2026-5347 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-5347

CWE-862Published: April 24, 2026· Updated: Apr 24, 2026

5.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-5347 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.