CVE-2025-6726 MEDIUM

CVE-2025-6726: Block Editor Gallery Slider <= 1.1.1 - Missing Authorization to Authenticated (Subscriber+) Limited Post Meta Update

Vendor Krasenslavov
Product Block Editor Gallery Slider for WordPress – Image Slider, Gallery Carousel & Lightbox Plugin
Weakness CWE-862 · Missing authorization
Published July 18, 2025
Last update April 8, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

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

Related vulnerabilities

08Related CVE