rilwis Slim SEO Plugin up to 4.11.1 on WordPress Shortcode Execution do_shortcode author os command injection

Summaryinfo

A vulnerability was found in rilwis Slim SEO Plugin up to 4.11.1. It has been rated as critical. This vulnerability affects the function do_shortcode of the component Shortcode Execution. The manipulation of the argument Author leads to os command injection. This vulnerability is uniquely identified as CVE-2026-104001. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in rilwis Slim SEO Plugin up to 4.11.1. It has been rated as critical. This issue affects the function do_shortcode of the component Shortcode Execution. The manipulation of the argument author with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-104001 since 10/01/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/16/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• rilwis

Name

• Slim SEO Plugin

Version

• 4.11.0
• 4.11.1

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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