How severe is CVE-2026-4431?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Themeruby Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content For Wordpress

CVE-2026-4431

The Easy Post Submission plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `create_post()` function in all versions up to, and including, 2.3.0. This is due to the `rbsm_submit…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Themeruby Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content For Wordpress — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2026-4431?: CVE-2026-4431 is a critical-severity vulnerability in Themeruby Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content For Wordpress, classified under Missing Authorization. CVSS score: 9.1/10. Published 2026-08-05.
How severe is CVE-2026-4431?: Critical severity. CVSS v3 base score is 9.1 out of 10.