CVE-2021-24306: Ultimatemember Ultimate Member

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

The Ultimate Member – User Profile, User Registration, Login & Membership Plugin WordPress plugin before 2.1.20 did not properly sanitise, validate or encode the query string when generating a link to edit user's own profile, leading to an authenticated reflected Cross-Site Scripting issue. Knowledge of the targeted username is required to exploit this, and attackers would then need to make the related logged in user open a malicious link.

Affected products

• Ultimatemember Ultimate Member: before 2.1.20 (fixed in 2.1.20)

Published 2021-05-24. Last modified 2026-06-17.