Name: CVE-2026-12900: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2026-07-20T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-12900, CWE-79, CVSS 6.4, EPSS 0.00321

The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `uagb/image` block in all versions up to, and including, 2.19.28 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS Details

CVSS 3.1 Base Score: 6.4
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Ultimate Addons For Gutenberg Plugin	—	Update ultimate-addons-for-gutenberg plugin to version 2.19.29, or a newer patched version	Jul 21, 2026	Jul 20, 2026

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CVSS Details

Covered by Rapid7

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