CVE-2026-2233

User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration <= 4.2.8 - Missing Authorization to Unauthenticated Arbitrary Post Modification via 'post_id' Parameter

2026-03-14 14:13

Strategic Overview

Status: Patched in 4.2.9
Affected Plugin: User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission
Affected Version: <= 4.2.8
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2026-2233

View all User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission vulnerabilities

At a glance

CVE-2026-2233 is a medium-severity Missing Authorization vulnerability in the User Frontend WordPress plugin, affecting versions <= 4.2.8. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.2.9; sites on affected versions should update now. Disclosed March 2026, reported by Supakiad S. (m3ez) (m3ez).

Vulnerability Overview

The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the draft_post() function in all versions up to, and including, 4.2.8. This makes it possible for unauthenticated attackers to modify arbitrary posts (e.g. unpublish published posts and overwrite the contents) via the 'post_id' parameter.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

User Frontend <= 4.2.8 carries this weakness at post_id, and reaching it takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For User Frontend the fix is 4.2.9: builds <= 4.2.8 are affected, anything from 4.2.9 onward is not.

Remediation

Update to version 4.2.9, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: User Frontend 4.2.9 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-2233 https://www.wordfence.com/threat-intel/vulnerabilities/id/e0a278a3-f229-4673-8b3e-5b68f383dcc7 https://nvd.nist.gov/vuln/detail/CVE-2026-2233

Related records

Same weakness class

Other vulnerabilities in User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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