PT-2026-20421 · WordPress · Ultimate Member

Dmitry Ignatyev · Published 2026-02-18 · Updated 2026-02-18 · CVE-2026-1404

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin versions prior to 2.11.2

Description The Ultimate Member plugin for WordPress is susceptible to Reflected Cross-Site Scripting due to inadequate input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts into pages. Successful exploitation requires tricking a user into performing an action, such as clicking a malicious link. The vulnerability is present through the filter parameters, for example, filter first name.

Recommendations Update The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin to version 2.11.2 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-1404

Affected Products

Ultimate Member

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-1404 · Security Note
• https://t.me/CVEtracker/44979 · Telegram Post
• https://plugins.trac.wordpress.org/changeset/3458086 · Note
• https://plugins.trac.wordpress.org/browser/ultimate-member/trunk/assets/js/um-members.js#L515 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/ba62b804-f101-4e29-8304-fb2b7dad333c?source=cve · Note
• https://plugins.trac.wordpress.org/browser/ultimate-member/trunk/templates/members.php#L348 · Note
• https://twitter.com/CVEnew/status/2024138058854285531 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2024261439951675500 · Twitter Post