CVE-2026-12900

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 v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/tags/2.19.28/blocks-config/image/class-uagb-image.php#L59
https://plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/tags/2.19.28/includes/blocks/image/block.php#L10
https://www.wordfence.com/threat-intel/vulnerabilities/id/0e9dc5e3-9d72-4c04-8ba9-56428a6fdddd?source=cve

Configurations

No configuration.

History

20 Jul 2026, 22:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-20 22:17

Updated : 2026-07-22 14:17

NVD link : CVE-2026-12900

Mitre link : CVE-2026-12900

CVE.ORG link : CVE-2026-12900

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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