Vulnerability · Published Dec 3, 2025 · Assigned by cisco
CVE-2025-20384Unauthenticated Log Injection in Splunk Enterprise
Medium 5.3
In plain English
A medium-severity security flaw in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.0 – before 10.0.19.4 – before 9.4.69.3 – before 9.3.89.2 – before 9.2.10 |
| Splunk | Splunk Cloud Platform | 10.1.2507 – before 10.1.2507.410.0.2503 – before 10.0.2503.69.3.2411 – before 9.3.2411.117 |
Weakness: CWE-117 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N