CVE-2025-20384

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 v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-117 CWE-117

Affected Products

Vendor	Product	Versions
splunk	splunk	9.2.0 — 9.2.10
splunk	splunk	9.3.0 — 9.3.8
splunk	splunk	9.4.0 — 9.4.6
splunk	splunk	All
splunk	splunk_cloud_platform	9.3.2411 — 9.3.2411.117
splunk	splunk_cloud_platform	10.0.2503 — 10.0.2503.6
splunk	splunk_cloud_platform	10.1.2507 — 10.1.2507.4

References

Advisories & Patches

https://advisory.splunk.com/advisories/SVD-2025-1203

Frequently Asked Questions

What is CVE-2025-20384? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-20384? +

CVE-2025-20384 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20384? +

CVE-2025-20384 affects products from splunk, specifically: splunk, splunk_cloud_platform. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20384? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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