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. Authenticated attackers with Contributor-level privileges or above can craft a two-block payload: the first block registers a fake block type with a malicious render_callback, and the second block triggers this callback during the page rendering process via call_user_func(). This allows execution of arbitrary code on the server hosting the WordPress site. The vulnerability affects all versions up to 2.19.25 and has a CVSS 3.1 base score of 8.8, indicating high severity. No patch or official remediation has been disclosed as of the published date.
Potential Impact
Successful exploitation allows an authenticated user with Contributor-level access or higher to execute arbitrary code on the server, potentially leading to full compromise of the affected WordPress site. The vulnerability impacts confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H). This elevates the risk significantly for sites using the vulnerable plugin versions.
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 updates from Brainstormforce regarding patches or mitigations. Avoid embedding untrusted block 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
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. Authenticated attackers with Contributor-level privileges or above can craft a two-block payload: the first block registers a fake block type with a malicious render_callback, and the second block triggers this callback during the page rendering process via call_user_func(). This allows execution of arbitrary code on the server hosting the WordPress site. The vulnerability affects all versions up to 2.19.25 and has a CVSS 3.1 base score of 8.8, indicating high severity. No patch or official remediation has been disclosed as of the published date.
Potential Impact
Successful exploitation allows an authenticated user with Contributor-level access or higher to execute arbitrary code on the server, potentially leading to full compromise of the affected WordPress site. The vulnerability impacts confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H). This elevates the risk significantly for sites using the vulnerable plugin versions.
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 updates from Brainstormforce regarding patches or mitigations. Avoid embedding untrusted block 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: 5/30/2026, 9:49:34 AM
Last enriched: 5/30/2026, 10:03:33 AM
Last updated: 5/31/2026, 2:34:10 AM
Views: 18
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