What the vulnerability does
01Description
The Slider, Gallery, and Carousel by MetaSlider – Image Slider, Video Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'delay' Post Meta Setting in all versions up to, and including, 3.111.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The ml-slider custom post type is registered without custom capability restrictions and the ml-slider_settings meta key is unprotected, allowing Author-level users to set the malicious delay value via XML-RPC custom_fields when creating an ml-slider post.
Explanation of Vulnerability in Simple Terms
02Summary
The MetaSlider plugin contains a stored cross-site scripting (XSS) vulnerability in versions up to 3.111.0. An authenticated user with low privileges can inject malicious scripts into slider content that execute in the browsers of other site visitors. The vulnerability affects the scope beyond the vulnerable component, potentially compromising site security and visitor data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers when they view affected slider content.
Potential impact on your site
04Site Impact
Visitors may have their sessions hijacked, credentials stolen, or be redirected to malicious sites when viewing pages with affected sliders.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account on the site; no user interaction required.
Key dates
06Disclosure timeline
August 6, 2026
CVE published
August 6, 2026
Record updated
