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CVE-2026-81278— WordPress Post SMTP plugin 4.0.0-beta.1 - Settings Change vulnerability

Quick assessment

Affected
WPExperts Post SMTP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

wpexperts post smtp是wpexperts个人开发者开源的一个SMTP邮件插件。 wpexperts post smtp 4.0.0版本至beta.1版本存在授权问题漏洞，该漏洞源于缺少授权，可能允许利用错误配置的访问控制安全级别。

CVSS 5.4 · Medium EPSS 0.29% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
WPExperts Post SMTP 4.0.0≤ beta.1 affected
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I. Basic Information for CVE-2026-81278

Vulnerability Information
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Vulnerability Title
WordPress Post SMTP plugin 4.0.0-beta.1 - Settings Change vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
wpexperts post smtp 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wpexperts post smtp是wpexperts个人开发者开源的一个SMTP邮件插件。 wpexperts post smtp 4.0.0版本至beta.1版本存在授权问题漏洞，该漏洞源于缺少授权，可能允许利用错误配置的访问控制安全级别。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WPExperts Post SMTP 4.0.0 ~ beta.1 -

II. Public POCs for CVE-2026-81278

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III. Intelligence Information for CVE-2026-81278

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Vendor Advisories for CVE-2026-81278 (1)

IV. Related Vulnerabilities

Same product: Post SMTP
Same vendor: WPExperts
Same weakness: CWE-862

V. Comments for CVE-2026-81278

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