AUGUST 15, 2026
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Case File

CVE-2026-4431

CRITICAL · CVSS 9.1 EPSS 0.33%

Source: NVD + CISA KEV + EPSS · Published 2026-08-05 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

The Easy Post Submission plugin for WordPress is critically vulnerable due to a lack of capability checks in the `create_post()` function, allowing unauthenticated users to modify arbitrary posts by manipulating the `postId` parameter. This vulnerability enables attackers to change post titles, content, categories, and even unpublish posts, posing a significant risk to website integrity. WordPress site administrators using this plugin should prioritize immediate updates to version 2.3.1 or later to mitigate this threat.

CVE
CVE-2026-4431
Severity
CRITICAL
CVSS
9.1
EPSS
0.33%
WordPress

Original NVD 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.