Stored Cross-Site Scripting Vulnerability in Ultimate Member Plugin for WordPress
CVE-2026-8489

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Vendor
CVE Published:
3 July 2026

What is CVE-2026-8489?

The Ultimate Member plugin for WordPress is susceptible to a stored cross-site scripting vulnerability through the 'about_me' parameter. This flaw arises from inadequate input sanitization and output escaping, allowing authenticated attackers with subscriber-level access or higher to inject arbitrary web scripts into pages. These malicious scripts execute whenever users access the compromised pages, potentially leading to security breaches and data exposure.

Affected Version(s)

Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin 0 <= 2.11.4

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/ultimate-membe...
https://plugins.trac.wordpress.org/browser/ultimate-membe...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daroo
.