CVE-2026-4431

9.1 CRITICAL

Published 2026-08-05 · Updated 2026-08-05

AI risk analysis

Summary: The flaw allows unauthenticated attackers to modify post data and change post status due to missing capability checks in the `create_post()` function.
Exploitability: Exploitation is relatively easy as it requires no authentication, but preconditions include having knowledge of specific post IDs.
Blast radius: If exploited, this could lead to significant data tampering and loss of published content on affected WordPress sites.
Prioritized remediation: Update the Easy Post Submission plugin to the latest version immediately or disable the `rbsm_submit_post` AJAX action for unauthenticated users.

auth-bypasswebwp-plugindata-modification

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

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.

CVSS vector

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

Weaknesses

CWE-862

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.