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Vulnerabilities CVE-2026-4431

CVE-2026-4431

Critical
Open
TLP:CLEAR

Easy Post Submission <= 2.3.0 - Missing Authorization

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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.

Details

CVSS Score
9.1
EPSS Score
0.33%

26.3th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Confidence
90%
Published
Aug 5, 2026
Last Modified
Aug 5, 2026
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