CVE-2026-81278

Deferred Deferred - Pending Action

Missing Authorization in Post SMTP Plugin

Publication date: 2026-08-31

Last updated on: 2026-09-01

Assigner: Patchstack

Description

Missing Authorization vulnerability in WPExperts Post SMTP allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Post SMTP: from 4.0.0 through beta.1.

CVSS Scores

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Meta Information

Published

2026-08-31

Last Modified

2026-09-01

Generated

2026-09-21

AI Q&A

2026-09-01

EPSS Evaluated

2026-09-15

NVD

CVE-2026-81278

Affected Vendors & Products

Vendor	Product	Version / Range
wpexperts	post_smtp	From 4.0.0 (inc) to beta.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability is a Missing Authorization issue in the WPExperts Post SMTP plugin. It allows attackers to exploit incorrectly configured access control security levels, potentially leading to unauthorized actions or data exposure.

Detection Guidance

To detect this vulnerability, check if Post SMTP versions 4.0.0 through beta.1 are installed. Review access control configurations for missing authorization checks. Inspect logs for unauthorized access attempts or unusual SMTP traffic patterns.

Impact Analysis

An attacker could exploit this to perform unauthorized actions or modify data within the Post SMTP plugin, potentially affecting email functionality or exposing sensitive information.

Compliance Impact

The vulnerability involves missing authorization in WPExperts Post SMTP, which could allow unauthorized access or modification of data. This may impact compliance with standards like GDPR (data protection) and HIPAA (healthcare data) by potentially exposing sensitive information or violating access control requirements.

Mitigation Strategies

Update Post SMTP to a version beyond beta.1 to address the missing authorization vulnerability. Ensure proper access control configurations are applied to prevent unauthorized access.

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