Junglewise Threat Intelligence

CVE-2026-8489: Ultimate Member WordPress plugin stored XSS in about_me parameter

CVE-2026-8489 · Severity: medium · CVSS 6.4 · Published 2026-07-03

Executive brief

The Ultimate Member plugin for WordPress, which manages user profiles and memberships, contains a security flaw that allows users with basic account access to inject malicious scripts into the website. These scripts can automatically run in the browsers of other visitors or administrators who view the affected profile pages. This could lead to unauthorized actions being performed on behalf of other users or the theft of sensitive session information.

Technical details

The Ultimate Member plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'about_me' parameter. Authenticated attackers with subscriber-level permissions or higher can inject arbitrary web scripts into their profile fields. These scripts are stored on the server and execute in the context of any user who views the compromised profile or member directory page. The vulnerability exists in all versions up to and including 2.11.4. A patch is expected in subsequent versions to address the lack of proper neutralization during web page generation (CWE-79).

Affected products

  • Ultimate Member Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin <= 2.11.4

Timeline

  • 2026-07-03: disclosed: CVE published by Wordfence and NVD

References

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