CVE-2026-8622
Description
The Image Sizes on Demand plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via PHP_SELF Server Variable in all versions up to, and including, 1.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The injected payload only executes in the context of an administrator, as the settings page requires the manage_options capability to render.
Summary dbcve.org
The Image Sizes on Demand WordPress plugin up to version 1.3 contains a reflected XSS vulnerability via the PHP_SELF server variable. The plugin fails to sanitize this input and escape output properly on its settings page, allowing unauthenticated attackers to inject malicious JavaScript through crafted URLs that execute when an administrator clicks the link.
Mitigation
Update to version 1.4 or later when available; in the interim, warn administrators against clicking untrusted links.