CVE-2026-92798 User Registration & Membership - Remote Code Execution

User Registration & Membership WordPress plugin <= 5.2.8 contains an arbitrary shortcode execution vulnerability caused by insufficient sanitization of the HTTP_REFERER header in UR_Smart_Tags::process(), letting unauthenticated attackers execute arbitrary registered shortcodes on restricted pages using the {{referrer_url}} smart tag.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.37% chance of exploitation in 30 days
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