---
id: "CVE-2026-111829"
kind: "vulnerability"
aliases: ["CVE-2026-111829"]
title: "WP Mailster WordPress plugin: PHP file inclusion flaw through version 1.9.1.0"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "wordpress", "wp-mailster"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-10-19T14:17:00+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T03:57:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111829", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# WP Mailster WordPress plugin: PHP file inclusion flaw through version 1.9.1.0

The WP Mailster WordPress plugin builds a PHP include or require path from input it does not control properly. An attacker can make the plugin load a local file, which can expose server files and may run code if the attacker can place or reach a suitable file.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed WP Mailster version in the WordPress admin plugin list or in the plugin's main file header (`wp-mailster`).
- Confirm whether the installed version is `1.9.1.0` or older.

## Fix

- Update WP Mailster to a version later than `1.9.1.0`; the fixed version is unknown from the sources.
- If no fixed version is available, deactivate the plugin until the vendor publishes one.

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111829

## From the sources

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in WP Mailster WP Mailster wp-mailster allows PHP Local File Inclusion.This issue affects WP Mailster: from n/a through 1.9.1.0.

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