CVE-2026-18044

Estatik Real Estate Plugin < 4.3.4 - Unauthenticated Mail Relay

2026-08-20 00:00

Strategic Overview

Status: Patched in 4.3.4
Affected Plugin: Estatik Real Estate Plugin
Affected Version: < 4.3.4
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2026-18044

View all Estatik Real Estate Plugin vulnerabilities

At a glance

CVE-2026-18044 is a medium-severity Missing Authorization vulnerability in the Estatik Real Estate Plugin WordPress plugin, affecting versions < 4.3.4. 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 4.3.4; sites on affected versions should update now. Disclosed August 2026, reported by Erwan LR.

Vulnerability Overview

The Estatik Real Estate Plugin plugin for WordPress is vulnerable to mail relay in all versions up to 4.3.4 (exclusive). This makes it possible for unauthenticated attackers to send emails to arbitrary recipients from the server.

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

Reaching this weakness in Estatik Real Estate Plugin < 4.3.4 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 Estatik Real Estate Plugin the fix is 4.3.4: builds < 4.3.4 are affected, anything from 4.3.4 onward is not.

Remediation

Update to version 4.3.4, 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: Estatik Real Estate Plugin 4.3.4 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-18044 https://www.wordfence.com/threat-intel/vulnerabilities/id/f30810d4-415c-4001-919d-eac753715474 https://nvd.nist.gov/vuln/detail/CVE-2026-18044

Related records

Same weakness class

5.4CVE-2023-6048: Estatik Real Estate Limited Arbitrary Options UpdateCVE-2023-6048

Other vulnerabilities in Estatik Real Estate Plugin

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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