What’s Vulnerable › Vulnerabilities

CVE-2024-8519: Ultimate Member <= 2.8.6 - Authenticated (Contributor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-04 · updated 2026-06-17
• Weakness: CWE-79

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 plugin's 'um_loggedin' shortcode in all versions up to, and including, 2.8.6 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership P: before 2.8.7 — fixed in 2.8.7

How to fix

Upgrade to a fixed version: ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership P 2.8.7. Check the vendor advisory for mitigations.

References

• https://github.com/ultimatemember/ultimatemember/blob/7b8a7a7c039bde4539c07e049b19036192f1c133/includes/core/class-shortcodes.php#L433
• https://github.com/ultimatemember/ultimatemember/pull/1545
• https://plugins.trac.wordpress.org/changeset/3160947/ultimate-member/tags/2.8.7/includes/core/class-shortcodes.php
• https://wordpress.org/plugins/ultimate-member/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9e394bb2-d505-4bf1-b672-fea3504bf936?source=cve

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