CVE-2026-8489
Received Received - Intake

Stored XSS in Ultimate Member WordPress Plugin

Publication date: 2026-07-03

Last updated on: 2026-07-03

Assigner: Wordfence

Description
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'about_me' parameter in all versions up to, and including, 2.11.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-07-03
Last Modified
2026-07-03
Generated
2026-07-03
AI Q&A
2026-07-03
EPSS Evaluated
N/A
NVD
CVE-2026-8489
EUVD
EUVD-2026-41486

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ultimate_member ultimate_member to 2.11.4 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.

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Executive Summary

This vulnerability exists in the Ultimate Member WordPress plugin, specifically in versions up to and including 2.11.4. It is a Stored Cross-Site Scripting (XSS) flaw that occurs via the 'about_me' parameter. The issue arises because the plugin does not properly sanitize input or escape output, allowing authenticated users with subscriber-level access or higher to inject malicious web scripts. These scripts then execute whenever any user views the affected page.

Impact Analysis

The impact of this vulnerability includes the potential for attackers to execute arbitrary scripts in the context of other users visiting the injected pages. This can lead to theft of user credentials, session hijacking, defacement, or distribution of malware. Since the attacker needs only subscriber-level access, it lowers the barrier for exploitation within the site.

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