Privilege escalation in Restrictmate

CVE-2026-13598

The RestrictMate WordPress plugin before 1.3.0 does not restrict the user role supplied during account registration, allowing unauthenticated attackers to create a new administrator account and gain a logged-in administrator session, leading to full site takeover.

Vulnerability class: Privilege Escalation

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (20.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.7% 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-2026-13598: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Restrictmate

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-13598?
CVE-2026-13598 is a critical-severity vulnerability in Restrictmate, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-08-23.
How severe is CVE-2026-13598?
Critical severity. CVSS v3 base score is 9.8 out of 10.