# CVE-2026-1865: WPEverest User Registration & Membership SQL injection in membership_ids

Source: https://junglewise.ai/threats/cve-2026-1865-wpeverest-user-registration-membership-sql-injection-in-membership  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-1865 · Severity: medium · CVSS 6.5 · Published 2026-04-08

A popular WordPress plugin used for managing user registrations and paid memberships is vulnerable to a security flaw that could allow logged-in users to access sensitive database information. By exploiting this weakness, an attacker with even a basic subscriber account could run unauthorized database commands. This could lead to the exposure of private user data or internal site configuration details, potentially compromising the privacy of your members.

Technologies: [WPEverest User Registration](https://junglewise.ai/threats/technologies/user-registration). Vendors: [WPEverest](https://junglewise.ai/threats/vendors/wpeverest).

## Quick answers

**Is CVE-2026-1865 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-1865 being exploited in the wild.

**How severe is CVE-2026-1865?** Medium severity, with a CVSS score of 6.5, published 8 April 2026.

**Which products and versions are affected?** WPEverest User Registration Up to, and including, 5.1.2.

**Is there a fix for CVE-2026-1865?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-1865 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-1865?** Check whether you run WPEverest User Registration at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The User Registration & Membership plugin for WordPress is vulnerable to SQL Injection due to insufficient escaping and lack of preparation on the 'membership_ids[]' parameter within SQL queries. This vulnerability exists in all versions up to and including 5.1.2. An authenticated attacker with Subscriber-level permissions or higher can exploit this by sending crafted requests to append malicious SQL commands to existing queries. Successful exploitation allows the attacker to extract sensitive information from the site's database. A patch has been identified in changeset 3469042.

## Affected products

- WPEverest User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder Up to, and including, 5.1.2

## Timeline

- 2026-04-08: disclosed
- 2026-04-08: advisory

## References

- [https://plugins.trac.wordpress.org/changeset/3469042/user-registration](https://plugins.trac.wordpress.org/changeset/3469042/user-registration)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/07c79459-66b8-4c93-a1cd-6e3ede95643f?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/07c79459-66b8-4c93-a1cd-6e3ede95643f?source=cve)

## Related threats

- [ThemeGrill User Registration broken access control](https://junglewise.ai/threats/cve-2026-52701-themegrill-user-registration-broken-access-control)
- [WPEverest User Registration & Membership payment bypass](https://junglewise.ai/threats/cve-2026-1869-wpeverest-user-registration-membership-payment-bypass)
- [ThemeGrill User Registration broken access control](https://junglewise.ai/threats/cve-2026-25425-themegrill-user-registration-broken-access-control)
- [WPEverest User Registration IDOR in media deletion](https://junglewise.ai/threats/cve-2026-7651-wpeverest-user-registration-idor-in-media-deletion)