6.3

CVE-2026-81278: wordpress post-smtp Missing Authorization

CVSS: 6.3v3.1MediumDeferred
Published 31-08-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-81278 is a medium (CVSS 6.3) Missing Authorization vulnerability in wordpress post-smtp. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.1% of scored vulnerabilities. Fixed in 4.0.1.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v3.1 (wordfence)
EPSS score
0.29%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-08-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

+0.12 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Wordpress1 product
  • post-smtp4.0.0-beta.1 (fixed in 4.0.1)
Wpexperts1 product

2 vendors · 2 products

References

2 links