CVE-2023-6569Public exploitNetwork attack vector

Unauthenticated file overwrite via frame export path

Published Dec 14, 2023 · Updated May 22, 2025

Path traversal in H2O-3 before 3.46.0.1 allows remote attackers to overwrite arbitrary server files through frame export requests. The frame export handlers accept a caller-supplied destination path and write CSV, XLS, Parquet, or similar output without first denying sensitive filesystem locations. Default deployments expose the REST API without authentication, and successful requests replace files with H2O-formatted, partly attacker-controlled content.

CVSS severity8.2
High
EPSS probability0.72%
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 H2O-3 before 3.46.0.1 allows remote attackers to overwrite arbitrary server files through frame export requests. The frame export handlers accept a caller-supplied destination path and write CSV, XLS, Parquet, or similar output without first denying sensitive filesystem locations. Default deployments expose the REST API without authentication, and successful requests replace files with H2O-formatted, partly attacker-controlled content.

The record

CVE
CVE-2023-6569
Published
Dec 14, 2023
Updated
May 22, 2025
Vendor
H2O.ai
Product
H2O-3
Classifications
CWE-610, CWE-73, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2023CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record 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=unspecified <=latest

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

H2O.ai · H2O-3version=unspecified <=latest

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
9.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-610Externally Controlled Reference to a Resource in Another Sphere
CWE-73External Control of File Name or Path
T1565.001Stored Data Manipulation

Public exploit references

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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