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CVE-2025-20384

Unauthenticated Log Injection in Splunk Enterprise

Published: Dec 3, 2025Updated: Dec 5, 2025 Sources: CVE List NVD BDUCWE-117
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 74.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-117

Affected Products

Splunk EnterpriseSplunkSecurity Products
Splunk Cloud PlatformSplunkSecurity Products
Splunk EnterpriseSplunk Inc.Security Products
Splunk Cloud PlatformSplunk Inc.Security Products
splunksplunkSecurity Products
splunkcommercialUSSecurity Productsaka splunk enterprise, splunk cloud platform
splunk inc.commercialUSSecurity Productsaka splunk
and 1 more affected products View all →

Exploitability

Official Patch Available

References

https://advisory.splunk.com/advisories/SVD-2025-1203
advisory.splunk.com
https://advisory.splunk.com/advisories/SVD-2025-1203
advisory.splunk.com
https://www.cybersecurity-help.cz/vdb/SB2025120404
cybersecurity-help.cz

Timeline

Published
Dec 3, 2025
Last Updated
Dec 5, 2025

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