CVE-2026-13756 | The WP Grid Builder plugin for WordPress is vulnerable to Pr… | CVSS 8.8 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.

Metadata

CVE ID: CVE-2026-13756
State: PUBLISHED
Assigner: Wordfence
Reserved: 2026-06-29 17:34 UTC
Published: 2026-07-11 01:29 UTC
Last updated: 2026-07-11 01:29 UTC
Primary CWE: CWE-269
CWE-269 Improper Privilege Management
Vendor / Product: WP Grid Builder / WP Grid Builder
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
WP Grid Builder	WP Grid Builder	—	0 ≤ 2.3.3

Weakness (CWE)

CWE	Source	Description
CWE-269	cna	CWE-269 Improper Privilege Management

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References (2)