Vulnerability in Splunk
CVE-2025-20384
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.
EPSS: 0.004 (27.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Splunk — versions 10.0.0
- Splunk Cloud Platform — versions 10.1.2507, 10.0.2503, 9.3.2411
- Splunk Splunk_cloud_platform
- Splunk Enterprise — versions 10.0, 9.4, 9.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20384?
- CVE-2025-20384 is a medium-severity vulnerability in Splunk, classified under Improper Output Neutralization for Logs. CVSS score: 5.3/10. Published 2025-12-03.
- How severe is CVE-2025-20384?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-20384 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.