What’s Vulnerable › Vulnerabilities
CVE-2025-20384: Unauthenticated Log Injection in Splunk Enterprise
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-03 · updated 2026-09-25
- Weakness: CWE-117
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.
Affected products
- Splunk Enterprise: from 9.2.0 before 9.2.10; from 9.3.0 before 9.3.8; from 9.4.0 before 9.4.6; 10.0.0 — fixed in 9.2.10, 9.3.8, 9.4.6
- Splunk Cloud Platform: from 9.3.2411 before 9.3.2411.117; from 10.0.2503 before 10.0.2503.6; from 10.1.2507 before 10.1.2507.4 — fixed in 10.0.2503.6, 10.1.2507.4, 9.3.2411.117
How to fix
Upgrade to a fixed version: Splunk Enterprise 9.2.10, 9.3.8, 9.4.6; Splunk Cloud Platform 10.0.2503.6, 10.1.2507.4, 9.3.2411.117. Check the vendor advisory for mitigations.
References
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