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Splunk CVE-2025-20321

| EUVDEUVD-2025-20295 MEDIUM
Cross-Site Request Forgery (CSRF) (CWE-352)
2025-07-07 psirt@cisco.com
6.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V3 - Web Frontend Security Anti-CSRF tokens, SameSite cookies
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

An attacker can perform state-changing operations (password changes, fund transfers, data deletion) using the victim's authenticated session. With a CVSS score of 6.5 (MEDIUM), this represents a moderate risk.

Exploit ScenarioDerived

An attacker hosts a malicious page that, when visited by an authenticated user, silently submits a forged request to the target application using the user's cookies.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

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.

Earlier versions of this analysis (1)
v1 Mar 16, 2026 - 03:37 CVSS 6.5

RemediationAI

Implement anti-CSRF tokens for all state-changing operations. Use SameSite cookie attribute. Verify the Origin/Referer header on the server side.

Affected VersionsENISA

Splunk Enterprise 9.3 <9.3.5
Splunk Enterprise Cloud 9.3.2411 <9.3.2411.104
Splunk Enterprise 9.2 <9.2.7
Splunk Enterprise Cloud 9.3.2408 <9.3.2408.114
Splunk Enterprise 9.1 <9.1.10
Splunk Enterprise Cloud 9.2.2406 <9.2.2406.119
Splunk Enterprise 9.4 <9.4.3

Affected Packages

euvd splunk_enterprise fix: 9.1.10, 9.2.7, 9.3.5, 9.4.3
euvd splunk_enterprise_cloud fix: 9.2.2406.119, 9.3.2408.114, 9.3.2411.104

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Cross-Site Request Forgery forces authenticated users to perform unintended actions by tricking their browser into sending forged requests. This vulnerability is classified as Cross-Site Request Forgery (CSRF) (CWE-352).

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
9.3.5,9.3.2411.104,9.2.7
CVE Published
Jul 07, 2025 - 18:15 nvd
MEDIUM 6.5

Executive ViewAI

Why It Matters

Organizations using Splunk Enterprise should be aware of notable risk from CVE-2025-20321, a cross-site request forgery vulnerability rated CVSS 6.5. Users could be tricked into performing unintended actions. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Moderate
Compensating Controls

Apply vendor patch. If patching is delayed: implement SameSite cookie attributes and anti-CSRF tokens.

Threat Intelligence Overview

EPSS Score
0.0%
Top 94% exploitable
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Request Forgery exploits the automatic credential inclusion behavior of web browsers.

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