CVE-2026-105055 PUBLISHED

WordPress WP Mailster plugin <= 1.9.0.0 - Broken Access Control vulnerability

Assigner: Patchstack
Reserved: 03.10.2026 Published: 05.10.2026 Updated: 05.10.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	WP Mailster
Product	WP Mailster
Versions	Default: unaffected affected from 0 to 1.9.0.0 (incl.)

Solutions

Update the WordPress WP Mailster plugin to the latest available version (at least 1.9.1.0).

Credits

Ratchanon Chamnankit | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-9-0-0-broken-access-control-vulnerability?_s_id=cve

Problem Types

Missing Authorization CWE

Impacts

Exploiting Incorrectly Configured Access Control Security Levels