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CVE-2025-20384

Unauthenticated Log Injection in Splunk Enterprise

MEDIUM
5.3
CVSS Score
Published: December 3, 2025 at 05:00 PM UTC
Updated: September 25, 2026 at 11:27 PM UTC
2 products affected across 1 vendorSplunkSplunk Cloud Platform

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Splunk· Splunk
95%
10.0 ≤ v < 10.0.19.2 ≤ v < 9.2.109.2.0 ≤ v < 9.2.109.3 ≤ v < 9.3.89.3.0 ≤ v < 9.3.89.4 ≤ v < 9.4.69.4.0 ≤ v < 9.4.610.010.0.09.29.39.4
Affected range stops below 10.0.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.2.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.3.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.4.6, so it looks safe — our inference, not a vendor statement
Splunk Cloud Platform· Splunk
95%
10.0.2503 ≤ v < 10.0.2503.610.1.2507 ≤ v < 10.1.2507.49.3.2411 ≤ v < 9.3.2411.11710.0.250310.1.25079.3.2411
Affected range stops below 10.0.2503.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.1.2507.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.3.2411.117, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://advisory.splunk.com/advisories/SVD-2025-1203

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMcisco
Vector?

Quick Info

StatusANALYZED
CWE
CWE-117

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