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Gutenverse <= 1.8.5 — Missing Authorization via 'data/update' API Endpoint

CVE-2023-35875Published · Updated

Action summary

Affected: ≤1.8.5Update to 1.8.6 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/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:N Privileges required
None
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
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Gutenverse – WordPress Blocks, Page Builder & Site Editor gutenverse

  1. Affected≤ 1.8.5
  2. Patched in1.8.6

Update to 1.8.6 or newer.

You are affected if you run ≤ 1.8.5. Version 1.8.6 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Gutenverse – WordPress Blocks, Page Builder & Site Editor.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 1.8.6, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Gutenverse – WordPress Blocks, Page Builder & Site Editor to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Kévin Mosbahi (Mika).

The Gutenverse plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'data/update' API Endpoint function in versions up to, and including, 1.8.5. This makes it possible for unauthenticated attackers to perform an unauthorized data update.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in Gutenverse – WordPress Blocks, Page Builder & Site Editor

All 15
More vulnerabilities in Gutenverse – WordPress Blocks, Page Builder & Site Editor
SeverityVulnerabilityCVEPublished
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Post Comment Block 'suffixMain' Attribute
≤4.0.8Update to 4.0.9
CVE-2026-92746
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Blocks
≤4.0.2Update to 4.0.3
CVE-2026-3002
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'titleTag' Block Attribute
≤4.0.2Update to 4.0.3
CVE-2026-19943
Medium4.4Authenticated (Editor+) Stored Cross-Site Scripting via 'fonts[].font.font.value' Parameter
≤3.8.0Update to 3.8.1
CVE-2026-12399
Medium6.1Reflected Cross-Site Scripting via 's' Parameter
≤3.4.6Update to 3.4.7
CVE-2026-3001

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 5.3

  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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