The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction &…

Why it is Yellow

• CVSS 6.4 medium

References

• https://github.com/ultimatemember/ultimatemember/releases/tag/2.14.1
• https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.14.0/includes/core/class-form.php#L896
• https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.14.0/includes/core/um-filters-fields.php#L519
• https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.14.0/includes/core/um-filters-fields.php#L522
• https://www.wordfence.com/threat-intel/vulnerabilities/id/8180160d-ba33-4f79-baa5-2613be470b0f?source=cve

Original 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 'user_url' parameter in all versions up to, and including, 2.14.0 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. Successful exploitation requires a visitor to click the attacker's Website URL link on their public Ultimate Member profile, a condition that is trivially met since the redirect-confirmation onclick handler is enabled by default on all new installations.