PT-2026-45089 · Brainstorm Force · Spectra Gutenberg Blocks – Website Builder For The Block Editor

Supanat Konprom · Published 2026-05-30 · Updated 2026-05-30 · CVE-2026-7465

Mitre

CVSS v3.1

8.8

High

Base vector

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

The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.19.25. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server. Exploitation requires a two-block payload embedded in post content: the first block registers a fake uagb/-prefixed block type with an attacker-specified render callback, and the second block of the same fake type triggers invocation of that callback via call user func() during sequential block rendering in the same page request.

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-7465

Affected Products

Spectra Gutenberg Blocks – Website Builder For The Block Editor

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-7465 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/60013752-d7cf-46e8-84e1-1b614f737b46?source=cve · Note
• https://plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/trunk/classes/class-uagb-init-blocks.php#L335 · Note
• https://wordpress.org/plugins/ultimate-addons-for-gutenberg/#developers · Note
• https://plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/trunk/classes/class-uagb-init-blocks.php#L330 · Note
• https://plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/tags/2.19.25/classes/class-uagb-init-blocks.php#L330 · Note
• https://plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/tags/2.19.25/classes/class-uagb-init-blocks.php#L335 · Note