Medium severity · published Dec 3, 2025
CVE-2025-20384
Unauthenticated Log Injection in Splunk Enterprise
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Splunk Cloud Platform · Splunk
10.1.2507 before 10.1.2507.4; 10.0.2503 before 10.0.2503.6; 9.3.2411 before 9.3.2411.117 · source: vendor, NVD
SE
Splunk Enterprise · Splunk
10.0 before 10.0.1; 9.4 before 9.4.6; 9.3 before 9.3.8; 9.2 before 9.2.10 · source: vendor
SP
Splunk · Splunk
9.2.0 before 9.2.10; 9.3.0 before 9.3.8; 9.4.0 before 9.4.6; 10.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-20384
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-20384
Vendor Advisory
https://advisory.splunk.com/advisories/SVD-2025-1203
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