CVE-2025-20321: Splunk

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

In Splunk Enterprise versions below 9.4.3, 9.3.5, 9.2.7 and 9.1.10, and Splunk Cloud Platform versions below 9.3.2411.104, 9.3.2408.114, and 9.2.2406.119, an unauthenticated attacker can send a specially-crafted SPL search that could change the membership state in a Splunk Search Head Cluster (SHC) through a Cross-Site Request Forgery (CSRF), potentially leading to the removal of the captain or a member of the SHC.<br><br>The vulnerability requires the attacker to phish the administrator-level victim by tricking them into initiating a request within their browser. The attacker should not be able to exploit the vulnerability at will.

Affected products

• Splunk Splunk: from 9.1.0, before 9.1.10 (fixed in 9.1.10); from 9.2.0, before 9.2.7 (fixed in 9.2.7); from 9.3.0, before 9.3.5 (fixed in 9.3.5); from 9.4.0, before 9.4.3 (fixed in 9.4.3)
• Splunk Splunk Cloud Platform: from 9.2.2406, before 9.2.2406.119 (fixed in 9.2.2406.119); from 9.3.2408, before 9.3.2408.114 (fixed in 9.3.2408.114); from 9.3.2411, before 9.3.2411.104 (fixed in 9.3.2411.104)

Published 2025-07-07. Last modified 2026-06-17.