What is CVE-2026-81278?

CVE-2026-81278 is a medium-severity vulnerability in Wpexperts Post Smtp, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-08-31.

How severe is CVE-2026-81278?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Wpexperts Post Smtp

CVE-2026-81278

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.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Wpexperts Post Smtp

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-81278?: CVE-2026-81278 is a medium-severity vulnerability in Wpexperts Post Smtp, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-08-31.
How severe is CVE-2026-81278?: Medium severity. CVSS v3 base score is 5.4 out of 10.