CVE-2025-20321: 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…

PriorityP420medium4.3CVSS 3.1

AVNACLPRNUIRSUCNILAN

EPSS

0.17%

6.5th percentile

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.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

17 ranges

Vendor	Product	Version range	Fixed in
msrc	cbl_mariner_1.0_arm	—	—
msrc	cbl_mariner_1.0_x64	—	—
msrc	cm1_kernel_5.10.102.1-1_on_cbl_mariner_1.0	—	—
splunk	splunk	>= 9.1.0 < 9.1.10	9.1.10
splunk	splunk	>= 9.2.0 < 9.2.7	9.2.7
splunk	splunk	>= 9.3.0 < 9.3.5	9.3.5
splunk	splunk	>= 9.4.0 < 9.4.3	9.4.3
splunk	splunk_cloud_platform	>= 9.2.2406 < 9.2.2406.119	9.2.2406.119
splunk	splunk_cloud_platform	>= 9.3.2408 < 9.3.2408.114	9.3.2408.114
splunk	splunk_cloud_platform	>= 9.3.2411 < 9.3.2411.104	9.3.2411.104
splunk	splunk_enterprise	>= 9.1 < 9.1.10	9.1.10
splunk	splunk_enterprise	>= 9.2 < 9.2.7	9.2.7
splunk	splunk_enterprise	>= 9.3 < 9.3.5	9.3.5
splunk	splunk_enterprise	>= 9.4 < 9.4.3	9.4.3
splunk	splunk_enterprise_cloud	>= 9.2.2406 < 9.2.2406.119	9.2.2406.119
splunk	splunk_enterprise_cloud	>= 9.3.2408 < 9.3.2408.114	9.3.2408.114
splunk	splunk_enterprise_cloud	>= 9.3.2411 < 9.3.2411.104	9.3.2411.104

CVSS provenance

nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

vendor_msrc4.7MEDIUM

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.