CVE-2025-20384: Splunk

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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 Splunk: from 9.2.0, before 9.2.10 (fixed in 9.2.10); from 9.3.0, before 9.3.8 (fixed in 9.3.8); from 9.4.0, before 9.4.6 (fixed in 9.4.6); version 10.0.0 only
• Splunk Splunk Cloud Platform: from 9.3.2411, before 9.3.2411.117 (fixed in 9.3.2411.117); from 10.0.2503, before 10.0.2503.6 (fixed in 10.0.2503.6); from 10.1.2507, before 10.1.2507.4 (fixed in 10.1.2507.4)

Published 2025-12-03. Last modified 2026-09-25.