davidanderson All-In-One Security Plugin up to 5.4.7 on WordPress AIOS Dashboard get_rest_route REQUEST_URI cross site scripting

Summaryinfo

A vulnerability was found in davidanderson All-In-One Security Plugin up to 5.4.7 on WordPress. It has been declared as problematic. Affected is the function get_rest_route of the component AIOS Dashboard. The manipulation of the argument REQUEST_URI results in cross site scripting. This vulnerability is known as CVE-2026-8438. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in davidanderson All-In-One Security Plugin up to 5.4.7 on WordPress. It has been classified as problematic. Affected is the function get_rest_route of the component AIOS Dashboard. The manipulation of the argument REQUEST_URI with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

The All-In-One Security (AIOS) – Security and Firewall plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 5.4.7. This is due to insufficient input sanitization in the get_rest_route() function and missing output escaping in the column_default() method of the debug log list table. When the 'Disable REST API for non-logged in users' feature (aiowps_disallow_unauthorized_rest_requests) is enabled alongside debug logging (aiowps_enable_debug), an unauthenticated attacker can embed arbitrary HTML or JavaScript in the REST request path. The path is retrieved via urldecode($_SERVER['REQUEST_URI']), which decodes URL-encoded payloads into literal HTML characters. This decoded, unsanitized value is concatenated directly into a debug log message and stored in the database. When an administrator navigates to the AIOS Dashboard Debug Logs page, the column_default() method returns the raw database value without escaping, and the parent list table echoes it directly, causing JavaScript execution in the administrator's browser session. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the debug log page, enabling nonce theft, privileged AJAX/REST actions, and potential full site compromise.

The weakness was published by Dmitrii Ignatyev. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-8438 since 05/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 5.4.6 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• davidanderson

Name

• All-In-One Security Plugin

Version

• 5.4.0
• 5.4.1
• 5.4.2
• 5.4.3
• 5.4.4
• 5.4.5
• 5.4.6
• 5.4.7

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Once again VulDB remains the best source for vulnerability data.

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