CVE-2026-13756
High
Description
The WP Grid Builder plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.3.3. This is due to missing authorization and meta key validation in the `update()` handler for the `/wp-json/wpgb/v2/metadata` REST endpoint. This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to Administrator by updating their own `wp_capabilities` user meta with a crafted nested array payload.
SeverityHigh
CVSS8.8
Exploit probability—
Product
WP Grid Builder
PublishedJul 11, 2026
First seenJul 11, 2026
Weakness typeCWE-269Improper privilege management
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| WP Grid Builder WP Grid Builder | v ≤ 2.3.3 | — |
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