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WordPress plugin

Kadence Blocks — Page Builder Toolkit for Gutenberg Editor <= 3.6.3 — Missing Authorization to Authenticated (Contributor+) Media Upload

CVE-2026-2826Published · Updated

Action summary

Affected: ≤3.6.3Update to 3.6.4 or newer

All remediation steps
Watch plugin
Severity
Medium4.3
CVSS
4.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-862 Missing Authorization
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Kadence Blocks — Page Builder Toolkit for Gutenberg Editor kadence-blocks

  1. Affected≤ 3.6.3
  2. Patched in3.6.4

Update to 3.6.4 or newer.

You are affected if you run ≤ 3.6.3. Version 3.6.4 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Kadence Blocks — Page Builder Toolkit for Gutenberg Editor.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 3.6.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Kadence Blocks — Page Builder Toolkit for Gutenberg Editor to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to lucsob.

The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.6.3. This is due to the plugin not properly verifying that a user has the `upload_files` capability in the `process_pattern` REST API endpoint. This makes it possible for authenticated attackers, with contributor level access and above, to upload images to the WordPress Media Library by supplying remote image URLs that the server downloads and creates as media attachments.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Kadence Blocks — Page Builder Toolkit for Gutenberg Editor

All 43
More vulnerabilities in Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
SeverityVulnerabilityCVEPublished
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.8.0.2Update to 3.8.1
CVE-2026-39742
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.8.0.1Update to 3.8.0.2
CVE-2026-115602
Medium6.4Authenticated (Author+) Stored Cross-Site Scripting via Block Font Family Attribute
≤3.7.12Update to 3.7.12.1
CVE-2026-104762
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.7.12Update to 3.7.12.1
CVE-2026-105890
High7.2Unauthenticated Stored Cross-Site Scripting
≤3.7.11.1Update to 3.7.12
CVE-2026-103354

Same weakness (Missing Authorization)

All Missing Authorization
Other Missing Authorization vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 4.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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