CVE-2025-0394Network attack vector

Arbitrary file upload via missing type validation

Published Jan 14, 2025 · Updated Apr 8, 2026

Arbitrary file upload in Groundhogg 3.7.3.5 and earlier allows remote authenticated users to place files on the site server. The gh_big_file_upload() function accepts upload content without validating its file type before storing it. Author-level WordPress access or higher is required; code execution follows only when the server treats an uploaded file as executable.

CVSS severity8.8
High
EPSS probability1.14%
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 Groundhogg 3.7.3.5 and earlier allows remote authenticated users to place files on the site server. The gh_big_file_upload() function accepts upload content without validating its file type before storing it. Author-level WordPress access or higher is required; code execution follows only when the server treats an uploaded file as executable.

The record

CVE
CVE-2025-0394
Published
Jan 14, 2025
Updated
Apr 8, 2026
Vendor
Groundhogg Inc.
Product
Groundhogg
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2025CVE 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 <=3.7.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Groundhogg Inc. · Groundhoggversion=0 <=3.7.3.5

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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