What is CVE-2026-16310?

CVE-2026-16310 is a critical-severity vulnerability in Learndash Memberdash, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2026-09-06.

How severe is CVE-2026-16310?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Learndash Memberdash

CVE-2026-16310

The MemberDash plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.8.5 via the 'id' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the password of any WordPress user, including administrators, by supplying an arbitrary user ID during registration, and take over their account without any notification sent to the victim.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Learndash Memberdash

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2026-16310?: CVE-2026-16310 is a critical-severity vulnerability in Learndash Memberdash, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2026-09-06.
How severe is CVE-2026-16310?: Critical severity. CVSS v3 base score is 9.8 out of 10.