Medium severity · published Aug 31, 2026
CVE-2026-81278
WordPress Post SMTP plugin 4.0.0-beta.1 - Settings Change vulnerability
5.4
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PS
Post SMTP · WPExperts
4.0.0 through beta.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81278
patchstack.com
https://patchstack.com/database/wordpress/plugin/post-smtp/vulnerability/wordpress-post-smtp-plugin-4-0-0-beta-1-settings-change-vulnerability?_s_id=cve
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