What the vulnerability does
01Description
The Block Editor Gallery Slider plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the classic_gallery_slider_options() function in all versions up to, and including, 1.1.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update limited post meta for arbitrary posts.
Explanation of Vulnerability in Simple Terms
02Summary
The Block Editor Gallery Slider plugin for WordPress contains a missing authorization check that allows authenticated users with low privileges to modify gallery content they should not have access to. An attacker with a basic WordPress account can alter or tamper with gallery slider data without proper permission validation. This affects all versions up to 1.1.1. Site administrators should update the plugin to a patched version when available.
What an attacker can do
03Attacker Capabilities
Modify gallery slider content without proper authorization checks.
Potential impact on your site
04Site Impact
Unauthorized users can alter gallery content, potentially defacing or corrupting image sliders on your site.
Conditions required to exploit
05Prerequisites
Attacker needs a low-privilege WordPress account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
July 18, 2025
CVE published
April 8, 2026
Record updated