CVE-2025-20384

Unauthenticated Log Injection in Splunk Enterprise

State: Published
Severity: 5.3 Medium
Published: Dec 3, 2025
Updated: Dec 3, 2025
Reserved: Oct 10, 2024

Description

In Splunk Enterprise versions below 10.0.1, 9.4.6, 9.3.8, and 9.2.10, and Splunk Cloud Platform versions below 10.1.2507.4, 10.0.2503.6, and 9.3.2411.117.125, an unauthenticated attacker can inject American National Standards Institute (ANSI) escape codes into Splunk log files due to improper validation at the /en-US/static/ web endpoint. This may allow them to poison, forge, or obfuscate sensitive log data through specially crafted HTTP requests, potentially impacting log integrity and detection capabilities.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	cisco

Weaknesses

CWE-117 The software does not neutralize or incorrectly neutralizes output that is written to logs.

Affected Products

Product	Versions
Splunk EnterpriseSplunk	10.0 to before 10.0.1Affected 9.4 to before 9.4.6Affected 9.3 to before 9.3.8Affected 9.2 to before 9.2.10Affected
Splunk Cloud PlatformSplunk	10.1.2507 to before 10.1.2507.4Affected 10.0.2503 to before 10.0.2503.6Affected 9.3.2411 to before 9.3.2411.117Affected

References

https://advisory.splunk.com/advisories/SVD-2025-1203

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