CVE-2023-4571

Terminal code execution via ANSI log injection

Published Aug 30, 2023 · Updated Feb 28, 2025

Log injection in Splunk IT Service Intelligence allows remote attackers to seed code execution through crafted ANSI escape sequences in logs. An unauthenticated HTTP request writes attacker-controlled ANSI control sequences to ITSI log files without neutralizing terminal commands. Execution occurs only when a user opens the log in a terminal that interprets those sequences, and runs with that terminal user's permissions.

CVSS severity8.6
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Log injection in Splunk IT Service Intelligence allows remote attackers to seed code execution through crafted ANSI escape sequences in logs. An unauthenticated HTTP request writes attacker-controlled ANSI control sequences to ITSI log files without neutralizing terminal commands. Execution occurs only when a user opens the log in a terminal that interprets those sequences, and runs with that terminal user's permissions.

The record

CVE
CVE-2023-4571
Published
Aug 30, 2023
Updated
Feb 28, 2025
Vendor
Splunk, Inc.
Product
Splunk IT Service Intelligence
Classifications
CWE-117, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 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

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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=4.13 <4.13.3
  2. Affected versionversion=4.15 <4.15.3
  3. Affected versionversion=4.17 <4.17.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Splunk, Inc. · Splunk IT Service Intelligenceversion=4.13 <4.13.3; version=4.15 <4.15.3; version=4.17 <4.17.1

Published CVSS scores

8.6Splunk Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-117Improper Output Neutralization for Logs
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

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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