CVE-2026-7465: CWE-269 Improper Privilege Management in brainstormforce Spectra Gutenberg Blocks – Website Builder for the Block Editor
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.
AI Analysis
Technical Summary
The Spectra Gutenberg Blocks plugin for WordPress suffers from an improper privilege management vulnerability (CWE-269) that enables remote code execution by authenticated users with Contributor or higher privileges. The attack requires crafting a post with two specific blocks: the first registers a fake block type with an attacker-controlled render_callback, and the second triggers the callback execution via call_user_func() during block rendering in the same request. This flaw exists in all versions up to 2.19.25 and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with Contributor-level access or above to execute arbitrary code on the web server hosting the WordPress site. This can lead to full compromise of the affected system, including data theft, site defacement, or further network pivoting. The vulnerability impacts confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access and above to trusted users only. Monitor for suspicious post content that may contain crafted block payloads. Avoid publishing untrusted content that could exploit this vulnerability.
CVE-2026-7465: CWE-269 Improper Privilege Management in brainstormforce Spectra Gutenberg Blocks – Website Builder for the Block Editor
Description
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.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Spectra Gutenberg Blocks plugin for WordPress suffers from an improper privilege management vulnerability (CWE-269) that enables remote code execution by authenticated users with Contributor or higher privileges. The attack requires crafting a post with two specific blocks: the first registers a fake block type with an attacker-controlled render_callback, and the second triggers the callback execution via call_user_func() during block rendering in the same request. This flaw exists in all versions up to 2.19.25 and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an attacker with Contributor-level access or above to execute arbitrary code on the web server hosting the WordPress site. This can lead to full compromise of the affected system, including data theft, site defacement, or further network pivoting. The vulnerability impacts confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access and above to trusted users only. Monitor for suspicious post content that may contain crafted block payloads. Avoid publishing untrusted content that could exploit this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-04-29T18:18:51.206Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1ab2aee29bf47b5015dfb5
Added to database: 05/30/2026, 09:49:34 UTC
Last enriched: 06/06/2026, 21:02:30 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 106
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