How severe is CVE-2025-20389?

CVE-2025-20389 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-20389 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20389?

CVE-2025-20389 primarily affects Splunk. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-20389?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-20389 have an EU (EUVD) identifier?

Yes. CVE-2025-20389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201001.

When was CVE-2025-20389 published?

CVE-2025-20389 was published on 2025-12-03 and last updated on 2026-06-17.

CVE-2025-20389

CVE-2025-20389 is a medium-severity vulnerability in Splunk with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201001
Weakness: CWE-20
Affected product: Splunk
Published: 2025-12-03
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2025-20389?: 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).
How severe is CVE-2025-20389?: CVE-2025-20389 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-20389 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20389?: CVE-2025-20389 primarily affects Splunk. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-20389?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20389 have an EU (EUVD) identifier?: Yes. CVE-2025-20389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201001.
When was CVE-2025-20389 published?: CVE-2025-20389 was published on 2025-12-03 and last updated on 2026-06-17.

References

https://advisory.splunk.com/advisories/SVD-2025-1208

Affected products (3)

cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*
cpe:2.3:a:splunk:splunk_secure_gateway:*:*:*:*:*:*:*:*

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