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JetFormBuilder <= 3.5.6.2 — Unauthenticated Arbitrary File Read via Media Field

CVE-2026-4373Published · Updated

Action summary

Affected: ≤3.5.6.2Update to 3.5.6.3 or newer

All remediation steps
Watch plugin
Severity
High7.5
CVSS
7.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:H Confidentiality
High
I:N Integrity
None
A:N Availability
None
Weakness
CWE-36 Absolute Path Traversal
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

JetFormBuilder — Dynamic Blocks Form Builder jetformbuilder

  1. Affected≤ 3.5.6.2
  2. Patched in3.5.6.3

Update to 3.5.6.3 or newer.

You are affected if you run ≤ 3.5.6.2. Version 3.5.6.3 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under JetFormBuilder — Dynamic Blocks Form Builder.
  • 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 3.5.6.3, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch JetFormBuilder — Dynamic Blocks Form Builder to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to daroo.

The JetFormBuilder plugin for WordPress is vulnerable to arbitrary file read via path traversal in all versions up to, and including, 3.5.6.2. This is due to the 'Uploaded_File::set_from_array' method accepting user-supplied file paths from the Media Field preset JSON payload without validating that the path belongs to the WordPress uploads directory. Combined with an insufficient same-file check in 'File_Tools::is_same_file' that only compares basenames, this makes it possible for unauthenticated attackers to exfiltrate arbitrary local files as email attachments by submitting a crafted form request when the form is configured with a Media Field and a Send Email action with file attachment.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in JetFormBuilder — Dynamic Blocks Form Builder

All 37
More vulnerabilities in JetFormBuilder — Dynamic Blocks Form Builder
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting
≤3.6.8Update to 3.6.8.1
CVE-2026-123482
Medium6.5Unauthenticated Arbitrary Shortcode Execution
≤3.6.8Update to 3.6.8.1
CVE-2026-123483
High7.2Unauthenticated Stored Cross-Site Scripting
≤3.6.8Update to 3.6.8.1
CVE-2026-123484
Medium6.5Unauthenticated Arbitrary Shortcode Execution
≤3.6.8Update to 3.6.8.1
CVE-2026-123860
High7.2Unauthenticated Stored Cross-Site Scripting via Form Record Preset Source
≤3.6.7Update to 3.6.7.1
CVE-2026-111317

Timeline

  1. CVE published

    Severity high, CVSS 7.5

  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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