CVE-2026-92798 Code injection in User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
Attackers can execute arbitrary shortcodes via the Referer header in the User Registration & Membership plugin, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92798?
CVE-2026-92798 is a high-severity code injection vulnerability in wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder, published on 17 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2026-92798?
How do I fix CVE-2026-92798?
No fix has been published for CVE-2026-92798 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-92798 being exploited?
There is no known exploitation of CVE-2026-92798 in the wild and no public exploit code.
Sources
Also known as GHSA-fc28-r9m2-c784.