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8.0
HIGH CVSS 3.1
CVE-2025-20387
Incorrect permissions assignment on Splunk Universal Forwarder for Windows during new installation or upgrade
Description

In Splunk Universal Forwarder for Windows versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, a new installation of or an upgrade to an affected version can result in incorrect permissions assignment in the Universal Forwarder for Windows Installation directory. This lets non-administrator users on the machine access the directory and all its contents.

INFO

Published Date :

Dec. 3, 2025, 5:15 p.m.

Last Modified :

Dec. 5, 2025, 5:35 p.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-20387 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Splunk splunk
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH d1c1063e-7a18-46af-9102-31f8928bc633
CVSS 3.1 HIGH [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update Splunk Universal Forwarder to a patched version to correct directory permissions.
  • Update Splunk Universal Forwarder to a secure version.
  • Verify installation directory permissions.
  • Ensure only administrators access the directory.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-20387.

URL Resource
https://advisory.splunk.com/advisories/SVD-2025-1206 Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-20387 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-20387 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-20387 vulnerability anywhere in the article.

  • CybersecurityNews
Splunk Enterprise Vulnerabilities Allows Privileges Escalation Via Incorrect File Permissions

A high-severity vulnerability has been disclosed in Splunk affecting its Enterprise and Universal Forwarder products for Windows, stemming from incorrect file permissions during installation and upgra ... Read more

Published Date: Dec 05, 2025 (16 hours, 18 minutes ago)
  • Daily CyberSecurity
High-Severity Splunk Flaw Allows Local Privilege Escalation via Incorrect File Permissions on Windows

Splunk administrators managing Windows environments are being urged to patch immediately following the discovery of two high-severity vulnerabilities affecting both the Enterprise platform and Univers ... Read more

Published Date: Dec 05, 2025 (22 hours, 42 minutes ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-20387 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Dec. 05, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
    Added CPE Configuration OR *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.2 *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.2.0 up to (excluding) 9.2.10 *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.3.0 up to (excluding) 9.3.8 *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.4.0 up to (excluding) 9.4.6
    Added Reference Type Cisco Systems, Inc.: https://advisory.splunk.com/advisories/SVD-2025-1206 Types: Vendor Advisory
  • New CVE Received by [email protected]

    Dec. 03, 2025

    Action Type Old Value New Value
    Added Description In Splunk Universal Forwarder for Windows versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, a new installation of or an upgrade to an affected version can result in incorrect permissions assignment in the Universal Forwarder for Windows Installation directory. This lets non-administrator users on the machine access the directory and all its contents.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
    Added CWE CWE-732
    Added Reference https://advisory.splunk.com/advisories/SVD-2025-1206
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact