Medium severity · published Apr 8, 2026
CVE-2026-1865
User Registration & Membership <= 5.1.2 - Authenticated (Subscriber+) SQL Injection via membership_ids[]
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
Affected product
UR
User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder
wpeverest
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1865
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1865
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3469042/user-registration
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/07c79459-66b8-4c93-a1cd-6e3ede95643f?source=cve
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