---
id: CVE-2026-111830
title: >-
  WordPress WP Mailster plugin <= 1.9.1.0 - Cross Site Scripting (XSS)
  vulnerability
summary: >-
  Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored
  XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-79
vendor: WP Mailster
product: wp-mailster
affected:
  - wp-mailster <= 1.9.1.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-22T10:48:15.330902Z'
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T10:56:14.523Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111830'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp-mailster-plugin-1-9-1-0-cross-site-scripting-xss-vulnerability?_s_id=cve
tags:
  - cve.org
ingestedAt: '2026-10-22T08:33:36.488Z'
---

## Overview

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.

## Affected

- `wp-mailster <= 1.9.1.0`

## Remediation

Update the WordPress WP Mailster plugin to the latest available version (at least 1.9.2.0).