CVE-2024-6311Network attack vector

Administrator-level arbitrary file upload via unchecked font type

Published Aug 28, 2024 · Updated Apr 8, 2026

Arbitrary file upload in Funnelforms Free 3.7.3.2 and earlier allows remote authenticated users to write dangerous files to the server. The af2_add_font AJAX handler processes uploaded font data without validating its file type before writing the supplied file. Administrator-level access is required; code execution depends on the server treating the uploaded file as executable.

CVSS severity7.2
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Funnelforms Free 3.7.3.2 and earlier allows remote authenticated users to write dangerous files to the server. The af2_add_font AJAX handler processes uploaded font data without validating its file type before writing the supplied file. Administrator-level access is required; code execution depends on the server treating the uploaded file as executable.

The record

CVE
CVE-2024-6311
Published
Aug 28, 2024
Updated
Apr 8, 2026
Vendor
Funnelforms LLC
Product
Funnelforms Free
Classifications
CWE-434, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=0 <=3.7.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Funnelforms LLC · Funnelforms Freeversion=0 <=3.7.3.2

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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