CVE-2026-92798: wpeverest user registration & membership – free & paid memberships, subscriptions, content restriction, user profile, custom user registration & login builder Code Injection

Vulnerability summary

CVE-2026-92798 is a high (CVSS 8.1) Code Injection vulnerability in wpeverest user registration & membership – free & paid memberships, subscriptions, content restriction, user profile, custom user registration & login builder. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.3% of scored vulnerabilities.

Timeline

1. 17-10-2026
   PublishedVulnerability first disclosed.
2. 18-10-2026
   Last modifiedVulnerability information updated.

Description

The User Registration & Membership plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 5.2.8 This is due to insufficient input sanitization in the 'referrer_url' branch of UR_Smart_Tags::process(), where the attacker-controlled HTTP_REFERER header is only passed through sanitize_text_field() — which does not strip WordPress shortcode delimiters — before being substituted into a Content Restriction message that is subsequently executed via apply_shortcodes()/do_shortcode(). This makes it possible for unauthenticated attackers to execute arbitrary registered shortcodes on any restricted page whose message uses the supported {{referrer_url}} smart tag.

• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.