Vulnerability · Published Aug 5, 2026 · Assigned by Wordfence

CVE-2026-4431Easy Post Submission <= 2.3.0 - Missing Authorization

Critical 9.1

In plain English

A critical-severity missing authorization in Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content for WordPress from themeruby. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.6%top 50.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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_post` AJAX action being registered for unauthenticated users via `wp_ajax_nopriv_rbsm_submit_post` without any authorization checks when a `postId` parameter is supplied. This makes it possible for unauthenticated attackers to modify the title, content, excerpt, categories, and tags of arbitrary posts, as well as change the post status to draft (effectively unpublishing them) via the 'postId' parameter.

Affected products (as reported)

Vendor	Product	Versions
themeruby	Easy Post Submission – Frontend Posting, Guest Publishing & Submit Content for WordPress	0 – through 2.3.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

In plain English

Official description

Affected products (as reported)

References