Vulnerability · Published May 28, 2026 · Assigned by Wordfence
CVE-2026-3173Meta Field Block <= 1.5.1 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary User Meta Exposure
Medium 6.5
In plain English
A medium-severity authorization bypass via user-controlled key in Meta Field Block – Display custom fields in the Block Editor without coding from mr2p. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Official description
The Meta Field Block plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.5.1. This is due to the plugin allowing users to specify arbitrary object IDs and object types via block attributes without validating whether the authenticated user has permission to access the requested object's metadata. This makes it possible for authenticated attackers, with Contributor-level access and above, to read arbitrary user meta, post meta, and term meta data from any object in the database. On sites using plugins that store sensitive data in meta fields (e.g., WooCommerce billing/shipping information), this could lead to the exposure of Personally Identifiable Information (PII) including names, email addresses, phone numbers, and physical addresses.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| mr2p | Meta Field Block – Display custom fields in the Block Editor without coding | 0 – through 1.5.1 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/247df9e2-0a63-49ad-86fa-cb4c6e62c4cf?source=cve
- https://plugins.trac.wordpress.org/browser/display-a-meta-field-as-block/trunk/meta-field-block.php#L206
- https://plugins.trac.wordpress.org/browser/display-a-meta-field-as-block/trunk/meta-field-block.php#L328
- https://plugins.trac.wordpress.org/changeset/3472303/