Auth bypass in Wpeverest User Registration & Membership – Free Paid Memberships, Subscriptions, Content Restriction, Profile, Custom Login Builder

CVE-2026-3601

The User Registration & Membership plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `embed_form_action()` function in all versions up to, and including, 5.1.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to append shortcode content to arbitrary pages they do not own or have permission to edit.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (26.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-3601: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-3601?
CVE-2026-3601 is a medium-severity vulnerability in Wpeverest User Registration & Membership – Free Paid Memberships, Subscriptions, Content Restriction, Profile, Custom Login Builder, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-05-05.
How severe is CVE-2026-3601?
Medium severity. CVSS v3 base score is 4.3 out of 10.