CVE-2026-4373Network attack vector

Unauthenticated file read via Media Field paths

Published Mar 21, 2026 · Updated Mar 21, 2026

Path traversal in Crocoblock JetFormBuilder 3.5.6.2 and earlier allows remote attackers to read local files through crafted form submissions. Uploaded_File::set_from_array accepts a Media Field preset path without confining it to the WordPress uploads directory, while File_Tools::is_same_file compares only basenames. Exploitation requires a form with a Media Field and a Send Email action configured to attach files, and the selected local file is sent as an email attachment.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Crocoblock JetFormBuilder 3.5.6.2 and earlier allows remote attackers to read local files through crafted form submissions. Uploaded_File::set_from_array accepts a Media Field preset path without confining it to the WordPress uploads directory, while File_Tools::is_same_file compares only basenames. Exploitation requires a form with a Media Field and a Send Email action configured to attach files, and the selected local file is sent as an email attachment.

The record

CVE
CVE-2026-4373
Published
Mar 21, 2026
Updated
Mar 21, 2026
Vendor
Crocoblock
Product
JetFormBuilder
Classifications
CWE-36, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=3.5.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Crocoblock · JetFormBuilderversion=* <=3.5.6.2

Published CVSS scores

7.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-36Absolute Path Traversal
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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