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CVE-2025-20389

Improper Input Validation in "label" column field in Splunk Secure Gateway App

MEDIUM
6.5
CVSS Score
Published: December 3, 2025 at 05:00 PM UTC
Updated: June 17, 2026 at 08:41 AM UTC
3 products affected across 1 vendorSplunkSplunk Cloud PlatformSplunk Secure Gateway

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

In Splunk Enterprise versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, and versions below 3.9.10, 3.8.58 and 3.7.28 of the Splunk Secure Gateway app on Splunk Cloud Platform, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a malicious payload through the `label` column field after adding a new device in the Splunk Secure Gateway app. This could potentially lead to a client-side denial of service (DoS).

Affected

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

Splunk· Splunk
95%
10.0 ≤ v < 10.0.210.0.0 ≤ v < 10.0.29.2 ≤ 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 < 9.4.610.09.29.39.4
Affected range stops below 10.0.2, 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 < 10.0.2503.810.1.2507 ≤ v < 10.1.2507.69.3.2411 ≤ v < 9.3.2411.12010.0.250310.1.25079.3.2411
Affected range stops below 10.0.2503.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.1.2507.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.3.2411.120, so it looks safe — our inference, not a vendor statement
Splunk Secure Gateway· Splunk
95%
3.7 ≤ v < 3.7.283.7.0 ≤ v < 3.7.283.8 ≤ v < 3.8.583.8.0 ≤ v < 3.8.583.9 ≤ v < 3.9.103.9.0 ≤ v < 3.9.103.73.83.9
Affected range stops below 3.7.28, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.8.58, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.9.10, 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-2025-1208

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20NVD-CWE-noinfo

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