Privilege escalation in User Registration & Membership

CVE-2026-80071

The User Registration & Membership WordPress plugin before 5.2.8 does not properly restrict who may author a membership plan or validate the plan a user attaches to their own account, allowing authenticated users with Author-level access and above to assign themselves an arbitrary role and escalate their privileges to Administrator.

Vulnerability class: Privilege Escalation

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% 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-2026-80071: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • User Registration & Membership

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-80071?
CVE-2026-80071 is a high-severity vulnerability in User Registration & Membership, classified under Improper Privilege Management. CVSS score: 7.2/10. Published 2026-09-13.
How severe is CVE-2026-80071?
High severity. CVSS v3 base score is 7.2 out of 10.