Medium severity · published Oct 5, 2026
CVE-2026-105055
WordPress WP Mailster plugin <= 1.9.0.0 - Broken Access Control vulnerability
5.3
CVSS
0.2%
EPSS
No
On KEV
Description
Missing Authorization vulnerability in WP Mailster WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through 1.9.0.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WM
WP Mailster · WP Mailster
through 1.9.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105055
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105055
vdb-entry
https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-9-0-0-broken-access-control-vulnerability?_s_id=cve
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