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WordPress security records

WordPress Vulnerability Listing

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Dataset last synchronized: 2026-08-03 00:31:25 UTC

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4 vulnerability records

MediumCVE-2026-8981

Custom Block Builder – Lazy Blocks < 4.3.0 - Authenticated (Administrator+) Stored Cross-Site Scripting

Custom Block Builder – Lazy Blocks: Currently marked unpatched

Affected versions: [*, 4.3.0)

Vulnerability type: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected software, patched versions and attribution

The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to 4.3.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Custom Block Builder – Lazy Blocks

Affected versions: [*, 4.3.0)

Patched versions: 4.3.0

Researcher credit: Luca Jungnickel

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

This record contains material that is subject to copyright

Copyright 1999-2026 The MITRE Corporation

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
June 11, 2026
CVSS
4.4
HighCVE-2026-1560

Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution

Custom Block Builder – Lazy Blocks: Currently marked unpatched

Affected versions: *-4.2.0

Vulnerability type: CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected software, patched versions and attribution

The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.2.0 via multiple functions in the 'LazyBlocks_Blocks' class. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.

Custom Block Builder – Lazy Blocks

Affected versions: *-4.2.0

Patched versions: 4.2.1

Researcher credit: Youssef Elouaer

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

This record contains material that is subject to copyright

Copyright 1999-2026 The MITRE Corporation

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
February 10, 2026
CVSS
8.8
MediumCVE-2025-58258

Lazy Blocks <= 4.1.0 - Missing Authorization

Custom Block Builder – Lazy Blocks: Currently marked unpatched

Affected versions: *-4.1.0

Vulnerability type: CWE-862 Missing Authorization

Affected software, patched versions and attribution

The Lazy Blocks plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the maybe_export_json() function in versions up to, and including, 4.1.0. This makes it possible for authenticated attackers, with contributor-level access and above, to export block data.

Custom Block Builder – Lazy Blocks

Affected versions: *-4.1.0

Patched versions: 4.1.1

Researcher credit: MD ISMAIL

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

This record contains material that is subject to copyright

Copyright 1999-2026 The MITRE Corporation

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
September 22, 2025
CVSS
4.3
MediumCVE-2024-12878

Custom Block Builder – Lazy Blocks <= 3.8.2 - Reflected Cross-Site Scripting

Custom Block Builder – Lazy Blocks: Currently marked unpatched

Affected versions: *-3.8.2

Vulnerability type: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected software, patched versions and attribution

The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in all versions up to, and including, 3.8.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Custom Block Builder – Lazy Blocks

Affected versions: *-3.8.2

Patched versions: 3.8.3

Researcher credit: Hassan Khan Yusufzai - Splint3r7

Applicable copyright and licence notices

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Licence reference

This record contains material that is subject to copyright

Copyright 1999-2026 The MITRE Corporation

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Licence reference

Original Wordfence record
Published
February 4, 2025
CVSS
6.1

Vulnerability data: Wordfence Intelligence. Analysis and practical guidance: 3Zero Digital.

Data Source, Attribution and Methodology

Production Feed records are aggregated without claiming discovery, exploitation or infection. Applicable source notices remain attached to individual records. Read the methodology.