CVE-2026-15222 User Registration & Membership <= 5.2.8 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via display_name
Authenticated subscribers can execute arbitrary shortcodes due to improper validation, 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-2026-15222?
CVE-2026-15222 is a medium-severity code injection vulnerability in wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.2.8. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes.
Weakness: CWE-94
Which versions are affected by CVE-2026-15222?
How do I fix CVE-2026-15222?
No fix has been published for CVE-2026-15222 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-2026-15222 being exploited?
There is no known exploitation of CVE-2026-15222 in the wild and no public exploit code.
Sources
Also known as GHSA-4cx9-54r5-3429.