CVE-2026-5347 Missing authorization in WP Books Gallery – Build Stunning Book Showcases & Libraries in Minutes
Unauthenticated attackers can modify the custom post type slug for the books gallery, breaking existing links and SEO rankings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5347?
CVE-2026-5347 is a medium-severity missing authorization vulnerability in mhmrajib WP Books Gallery – Build Stunning Book Showcases & Libraries in Minutes, published on 24 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-5347?
How do I fix CVE-2026-5347?
No fix has been published for CVE-2026-5347 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-5347 being exploited?
There is no known exploitation of CVE-2026-5347 in the wild and no public exploit code.
Sources
Also known as GHSA-7cw2-vvg5-h9pj.