Incorrect permission assignment on Universal Forwarder for Windows during new installation or upgrade
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In Universal Forwarder for Windows versions below 9.4.2, 9.3.4, 9.2.6, and 9.1.9, 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 (by default, C:\Program Files\SplunkUniversalForwarder). This lets non-administrator users on the machine access the directory and all its contents.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Splunk | Splunk/UniversalForwarder for Windows | 9.4 to before 9.4.2; 9.3 to before 9.3.4; 9.2 to before 9.2.6; 9.1 to before 9.1.9 | 9.4.2, 9.3.4, 9.2.6, 9.1.9 | Patch available | CNA |
- Splunk/UniversalForwarder for Windows VendorSplunk Affected 9.4 to before 9.4.2; 9.3 to before 9.3.4; 9.2 to before 9.2.6; 9.1 to before 9.1.9 Fixed in 9.4.2, 9.3.4, 9.2.6, 9.1.9 Patch available CNA
Remediation
- Fix · CNA Splunk/UniversalForwarder for Windows (Splunk) Fixed in 9.4.2, 9.3.4, 9.2.6, 9.1.9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-20298
- 2026-10-03 Alias added: GHSA-4q83-43xw-q63j
References
More Splunk Universal Forwarder vulnerabilities
- TI-2023-12257 Injection in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
- TI-2022-13930 Information disclosure in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
- TI-2022-13917 Incorrect default permissions in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
- TI-2023-09712 Cleartext transmission of sensitive information in https://github.com/curl/curl CVSS 3.1CRITICAL 9.1
- TI-2021-05762 Use after free in https://github.com/curl/curl CVSS 3.1HIGH 8.1
- TI-2023-12258 Path traversal in https://github.com/curl/curl CVSS 3.1HIGH 8.8
Sources
- CVE-2025-20298 · CVE Program
- CVE-2025-20298 · NVD
- FIRST EPSS
- GHSA-4q83-43xw-q63j · GitHub Advisory Database · CC BY 4.0
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