CVE-2026-104001
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk13th percentile - higher than 13% of all known CVEs
Summary
The Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated plugin for WordPress in versions up to and including 4.11.1 is vulnerable to arbitrary shortcode execution. Authenticated attackers with subscriber-level access and above can save a shortcode payload to their Biographical Info field, which then executes on any unauthenticated front-end request that resolves that author's description.
Risk Assessment
The ability to execute arbitrary shortcodes may lead to information disclosure, content modification, or other unauthorized actions. The vulnerability is exploitable by a low-privileged user.
Recommendation
Update the plugin to a version later than 4.11.1 to fix the arbitrary shortcode execution vulnerability.
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Original NVD description (English source)
The The Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 4.11.1 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes. A Subscriber-level user need only save the shortcode payload to their own Biographical Info field via the REST API or wp-admin profile page; the shortcode then executes on any unauthenticated front-end request that resolves that author's description, such as requests using the ?author= query parameter when auto_redirection is disabled.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

