CVE-2025-20378: splunk 10.0.0; +3 more affected products

Affected technology

splunk · from 9.2.0 (inclusive), before 9.2.9 (exclusive)
splunk

splunk · from 9.3.0 (inclusive), before 9.3.7 (exclusive)
splunk

splunk · from 9.4.0 (inclusive), before 9.4.5 (exclusive)
splunk

splunk · 10.0.0
splunk

splunk cloud platform · from 9.3.2408 (inclusive), before 9.3.2408.121 (exclusive)
splunk

splunk cloud platform · from 9.3.2411 (inclusive), before 9.3.2411.111 (exclusive)
splunk

splunk cloud platform · from 10.0.2503 (inclusive), before 10.0.2503.5 (exclusive)
splunk

Splunk Enterprise · 10.0 to before 10.0.1, 9.4 to before 9.4.5, 9.3 to before 9.3.7, 9.2 to before 9.2.9
Splunk

Splunk Cloud Platform · 10.0.2503 to before 10.0.2503.5, 9.3.2411 to before 9.3.2411.111, 9.3.2408 to before 9.3.2408.121
Splunk

Description’s affected range: versions below 10.0.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

An unauthenticated attacker could craft a malicious URL using the `return_to` parameter of the Splunk Web login endpoint. Vendor/CNA’s CVSS 3.1 assessment (base score 3.1/10) rates confidentiality impact as low; integrity and availability impact as none. NVD’s CVSS 3.1 assessment (base score 6.1/10) rates confidentiality and integrity impact as low; availability impact as none.