CVE-2026-1865 User Registration & Membership <= 5.1.2 - Authenticated (Subscriber+) SQL Injection via membership_ids[]
Authenticated attackers can exploit SQL injection in the membership_ids parameter to extract sensitive database information from the User Registration & Membership plugin.
- 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-2026-1865?
CVE-2026-1865 is a medium-severity SQL injection vulnerability in wpeverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to SQL Injection via the ‘membership_ids[]’ parameter in all versions up to, and including, 5.1.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Weakness: CWE-89
Which versions are affected by CVE-2026-1865?
How do I fix CVE-2026-1865?
No fix has been published for CVE-2026-1865 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-1865 being exploited?
There is no known exploitation of CVE-2026-1865 in the wild and no public exploit code.
Sources
Also known as GHSA-mrxh-x593-3g6r.