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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.

PUBLISHED Reserved 2026-06-29 | Published 2026-07-11 | Updated 2026-07-11 | Assigner Wordfence




HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-269 Improper Privilege Management

Product status

Default status
unaffected

Any version
affected

Timeline

2026-07-10:Disclosed

Credits

h0xilo finder

References

www.wordfence.com/...-a8c7-4bc5-80ca-5ef69d1f0b6c?source=cve

docs.wpgridbuilder.com/changelog/

cve.org (CVE-2026-13756)

nvd.nist.gov (CVE-2026-13756)

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