What the vulnerability does
01Description
The Media Library Alt Text Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'bvmalt_sc_div_update_alt_text' shortcode in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
The Media Library Alt Text Editor contains a stored cross-site scripting (XSS) vulnerability in versions up to 1.0.0. An authenticated user with low privileges can inject malicious scripts into alt text fields that execute in the browsers of other users viewing the media library. The vulnerability affects the entire site scope due to how the alt text is rendered across different contexts.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers when they view media library alt text.
Potential impact on your site
04Site Impact
Any authenticated user can inject scripts affecting other users' sessions, potentially stealing credentials or performing unauthorized actions.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege authenticated account on the site.
Key dates
06Disclosure timeline
March 7, 2026
CVE published
April 8, 2026
Record updated
