Spectra Gutenberg Blocks <= 2.19.25 - Authenticated (Contributor+) Remote Code Execution via Arbitrary PHP Function Call via Block Attributes

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Summary

CVECVE-2026-7465
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-30 10:16:23 UTC
Updated2026-06-01 15:16:05 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.000690000 probability, percentile 0.213250000 (date 2026-06-02)

Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Brainstormforce Spectra Gutenberg Blocks Website Builder For The Block Editor affected 2.19.25 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/tags/2.19.25/classes/cl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/tags/2.19.25/classes/cl... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/60013752-d7cf-46e8-84e1-1b614... [email protected] www.wordfence.com
wordpress.org/plugins/ultimate-addons-for-gutenberg [email protected] wordpress.org
plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/trunk/classes/class-uag... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-addons-for-gutenberg/trunk/classes/class-uag... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Supanat Konprom (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-29T18:53:52.000ZVendor Notified
CNA2026-05-29T20:27:40.000ZDisclosed
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