CVE-2023-22937Network attack vector

Unauthorized file upload via missing extension allowlist

Published Feb 14, 2023 · Updated Feb 28, 2025

Improper input validation in Splunk Enterprise and Splunk Cloud Platform allows remote authenticated users to upload unsupported file types. The Splunk Web lookup upload handler accepts filenames without restricting extensions to supported lookup formats, permitting unnecessary file types to be stored. Exploitation requires a role with upload_lookup_files; Splunk reports limited integrity impact and no confidentiality or availability impact.

CVSS severity4.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Splunk Enterprise and Splunk Cloud Platform allows remote authenticated users to upload unsupported file types. The Splunk Web lookup upload handler accepts filenames without restricting extensions to supported lookup formats, permitting unnecessary file types to be stored. Exploitation requires a role with upload_lookup_files; Splunk reports limited integrity impact and no confidentiality or availability impact.

The record

CVE
CVE-2023-22937
Published
Feb 14, 2023
Updated
Feb 28, 2025
Vendor
Splunk, Inc.
Product
Splunk Enterprise
Classifications
CWE-20, CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=8.1 <8.1.13
  2. Affected versionversion=8.2 <8.2.10
  3. Affected versionversion=9.0 <9.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Splunk, Inc. · Splunk Enterpriseversion=8.1 <8.1.13; version=8.2 <8.2.10; version=9.0 <9.0.4
Splunk, Inc. · Splunk Cloud Platformversion=- <9.0.2209.3

Published CVSS scores

4.3SplunkCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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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