Input validation error in Splunk Enterprise and Splunk Secure Gateway - CVE-2025-20389
Published: December 4, 2025
Vulnerability identifier: #VU119139
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-20389
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Splunk Inc.
Affected software:
Splunk Enterprise
Splunk Secure Gateway
Splunk Enterprise
Splunk Secure Gateway
Detailed vulnerability description
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in the "label" column field in Splunk Secure Gateway App. A remote user can pass a malicious payload through the label column field after adding a new device in the Splunk Secure Gateway app and perform a denial of service attack.
How to mitigate CVE-2025-20389
Install updates from vendor's website.