Improper Output Neutralization for Logs in Splunk Enterprise - CVE-2025-20384
Published: December 4, 2025
Vulnerability identifier: #VU119117
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-20384
CWE-ID: CWE-117
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Splunk Inc.
Affected software:
Splunk Enterprise
Splunk Enterprise
Detailed vulnerability description
The vulnerability allows a remote attacker to manipulate application logs.
The vulnerability exists due to improper input validation at the "/en-US/static/" web endpoint. A remote non-authenticated attacker can inject American National Standards Institute (ANSI) escape codes into Splunk log files and manipulate their contents.
How to mitigate CVE-2025-20384
Install updates from vendor's website.