---
id: "CVE-2026-114451"
page: "https://infrastack.ai/live/CVE-2026-114451"
kind: "vulnerability"
aliases: ["CVE-2026-114451"]
title: "Membership Plugin for WordPress: unauthenticated users can corrupt stored membership data"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["membership-plugin", "package", "self-hosted", "wordpress"]
not_affected_if: ["plugin-not-installed", "version-4.0.6-or-later"]
published_at: "2026-11-15T07:16:53+00:00"
first_seen_at: "2026-11-15T07:36:11+00:00"
updated_at: "2026-11-15T07:36:22+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114451", "first_seen_at": "2026-11-15T07:36:11+00:00"}]
exploit_sources: []
---

# Membership Plugin for WordPress: unauthenticated users can corrupt stored membership data

Link for people: https://infrastack.ai/live/CVE-2026-114451 (this .md is for agents)

The Membership Plugin for WordPress before 4.0.6 runs a database maintenance routine without any authorization or CSRF check. An unauthenticated visitor can trigger it to convert the plugin's tables to a narrower character set, irreversibly replacing 4-byte characters such as emoji in membership, discount code and payment records with question marks.

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

## How to check

- Check the installed Membership Plugin version in the WordPress admin plugins list or the plugin's main file header; unknown whether a specific version string is listed in the sources beyond 'before 4.0.6'.
- Confirm whether the plugin is active on the site.

## Fix

- Membership Plugin for WordPress: move to `4.0.6` or later (the sources state the plugin is fixed in versions from 4.0.6).

## Timeline

- 2026-11-15T07:36:11+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114451

## From the sources

The Membership Plugin  WordPress plugin before 4.0.6 does not perform any authorization or CSRF check before running a schema-altering database maintenance routine, allowing unauthenticated users to convert the Membership Plugin  WordPress plugin before 4.0.6's own tables to a narrower character set, which irreversibly replaces every 4-byte character (such as emoji and some CJK characters) in the membership level, discount code and payment records with a question mark.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_