onedesigns One User Avatar Plugin up to 2.5.4 on WordPress File Upload wpua_action_process_option_update cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in onedesigns One User Avatar Plugin up to 2.5.4. The affected element is the function wpua_action_process_option_update of the component File Upload. Executing a manipulation can lead to cross site scripting. This vulnerability is registered as CVE-2026-18983. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in onedesigns One User Avatar Plugin up to 2.5.4 and classified as problematic. This vulnerability affects the function wpua_action_process_option_update of the component File Upload. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. CVE summarizes:

The One User Avatar | User Profile Picture plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.5.4 via the wpua_action_process_option_update function. This is due to insufficient file type validation in wp_handle_upload() called without a MIME allow-list, with post-write validation relying on the attacker-controlled client-supplied Content-Type header rather than a server-derived type, and no cleanup of files that fail the check. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. in order to exploit this vulnerability an admin has to give subscribers permission to upload avatars. While PHP files and svg files are rejected, dxfp files are accepted.

The advisory is available at wordfence.com. This vulnerability was named CVE-2026-18983 since 08/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• onedesigns

Name

• One User Avatar Plugin

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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