Meta-box GalleryMeta <= 3.0.1 - Missing Authorization to Authenticated (Author+) Gallery Management
Strategic Overview
- Status
- Patched in 3.1
- Affected Plugin
- Meta-box GalleryMeta
- Affected Version
<= 3.0.1- CVSS
- 4.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-0687
At a glance
CVE-2026-0687 is a medium-severity Missing Authorization vulnerability in the Meta-box GalleryMeta WordPress plugin, affecting versions <= 3.0.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Author level or above. The issue is fixed in version 3.1; sites on affected versions should update now. Disclosed January 2026, reported by Kazuma Matsumoto.
Vulnerability Overview
The Meta-box GalleryMeta plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'mb_gallery' custom post type in all versions up to, and including, 3.0.1. This makes it possible for authenticated attackers, with Author-level access and above, to create and publish galleries.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.
CWE-862: Missing Authorization
Meta-box GalleryMeta <= 3.0.1 carries this weakness at mb_gallery, and reaching it takes an account at Author level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Meta-box GalleryMeta the fix is 3.1: builds <= 3.0.1 are affected, anything from 3.1 onward is not.
Remediation
Update to version 3.1, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Meta-box GalleryMeta 3.1 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Meta-box GalleryMeta
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