CVE-2026-4431 — Vulnerability Advisory

Overview

Summary

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.

Risk profile

CVSS assessment

9.1 · C R I T I C A L

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Attack vector: N E T W O R K
Complexity: L O W
Privileges: N O N E
User interaction: N O N E
Scope: U N C H A N G E D
Confidentiality: N O N E
Integrity: H I G H
Availability: H I G H

Classification

Weaknesses

Missing Authorization CWE-862

References

5 sources