Ultimate Member <= 2.14.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'user_url' Profile Field
Impact
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…
Source excerpt · WordfenceSuccessful 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.
Affected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
ultimatemember · Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Other versions: unaffected
| Version / range | Source status |
|---|---|
| 0 through 2.14.0 (inclusive) | affected |
Original source 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.
References
- Security advisory www.wordfence.com/threat-intel/vulnerabilities/id/8180160d-ba33-4f79-baa5-2613be470b0f
- Source reference plugins.trac.wordpress.org/browser/ultimate-member/tags/2.14.0/includes/core/um-filters-fields.php
- Source reference plugins.trac.wordpress.org/browser/ultimate-member/tags/2.14.0/includes/core/um-filters-fields.php
- Source reference plugins.trac.wordpress.org/browser/ultimate-member/tags/2.14.0/includes/core/class-form.php
- Release notes github.com/ultimatemember/ultimatemember/releases/tag/2.14.1