---
id: "CVE-2026-120836"
page: "https://infrastack.ai/live/CVE-2026-120836"
kind: "vulnerability"
aliases: ["CVE-2026-120836"]
title: "Meta Box WordPress plugin: missing authorization check exposes data to users"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["meta-box", "package", "wordpress"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-11-07T18:17:18+00:00"
first_seen_at: "2026-11-07T18:48:29+00:00"
updated_at: "2026-11-07T18:50:00+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120836", "first_seen_at": "2026-11-07T18:48:29+00:00"}]
exploit_sources: []
---

# Meta Box WordPress plugin: missing authorization check exposes data to users

Link for people: https://infrastack.ai/live/CVE-2026-120836 (this .md is for agents)

Meta Box, a WordPress custom fields framework by eLightUp, has a missing authorization check that lets a user perform actions they should not be allowed to. The sources do not say exactly which data or actions an attacker reaches.

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

## How to check

- Check the installed Meta Box plugin version in the WordPress admin under Plugins, or in `wp-content/plugins/meta-box/meta-box.php`.
- Treat any version through `5.15.3` as affected.

## Fix

- Move Meta Box to a version newer than `5.15.3`; the sources do not name the exact fixed release.

## Timeline

- 2026-11-07T18:48:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120836

## From the sources

Missing Authorization vulnerability in eLightUp Meta Box – WordPress Custom Fields Framework meta-box allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Meta Box – WordPress Custom Fields Framework: from n/a through 5.15.3.

---

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