Auth bypass in Restrict User Access

CVE-2026-78153

The Restrict User Access WordPress plugin before 2.8.1 does not normalise the REST API route before checking it against the routes its content protection covers, allowing unauthenticated users to bypass that protection and read restricted content and enumerate users.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (27.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% 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-2026-78153: held from 0.002 to 0.004.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

  • Restrict User Access

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-78153?
CVE-2026-78153 is a medium-severity vulnerability in Restrict User Access, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-09-02.
How severe is CVE-2026-78153?
Medium severity. CVSS v3 base score is 5.3 out of 10.