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CVE-2025-20378

Open Redirect on Web Login endpoint in Splunk Enterprise

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 10.0.1, 9.4.5, 9.3.7, 9.2.9, 10.0.2503.5, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

In Splunk Enterprise versions below 10.0.1, 9.4.5, 9.3.7, 9.2.9, and Splunk Cloud Platform versions below 10.0.2503.5, 9.3.2411.111, and 9.3.2408.121, an unauthenticated attacker could craft a malicious URL using the `return_to` parameter of the Splunk Web login endpoint. When an authenticated user visits the malicious URL, it could cause an unvalidated redirect to an external malicious site. To be successful, the attacker has to trick the victim into initiating a request from their browser. The unauthenticated attacker should not be able to exploit the vulnerability at will.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Splunk Splunk Enterprise

    From 10.0 · fixed in 10.0.1; From 9.4 · fixed in 9.4.5; From 9.3 · fixed in 9.3.7; From 9.2 · fixed in 9.2.9

  • Splunk Splunk Cloud Platform

    From 10.0.2503 · fixed in 10.0.2503.5; From 9.3.2411 · fixed in 9.3.2411.111; From 9.3.2408 · fixed in 9.3.2408.121

References 1

advisory.splunk.com