CVE-2026-20258

Stored Cross-Site Scripting (XSS) through Classic Dashboard in Splunk Enterprise

MEDIUM

5.4

CVSS Score

Published: June 10, 2026 at 05:16 PM UTC

Updated: June 17, 2026 at 10:17 AM UTC

2 products affected across 1 vendorSplunkSplunk Cloud Platform

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.11, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the "admin" or "power" Splunk roles could store a malicious script in a classic dashboard HTML panel, causing unauthorized JavaScript code to execute in the browser of another user. The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The low-privileged user should not be able to exploit the vulnerability at will.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Splunk · Splunk

95%

10.0 ≤ v < 10.0.710.0.0 ≤ v < 10.0.710.2 ≤ v < 10.2.410.2.0 ≤ v < 10.2.49.3 ≤ v < 9.3.139.3.0 ≤ v < 9.3.139.4 ≤ v < 9.4.129.4.0 ≤ v < 9.4.1210.0 10.2 9.3 9.4

Affected range stops below 10.0.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.2.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.3.13, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.4.12, so it looks safe — our inference, not a vendor statement

Splunk Cloud Platform · Splunk

95%

10.1.2507 ≤ v < 10.1.2507.2310.2.2510 ≤ v < 10.2.2510.1510.3.2512 ≤ v < 10.3.2512.119.3.2411 ≤ v < 9.3.2411.13210.1.2507 10.2.2510 10.3.2512 9.3.2411

Affected range stops below 10.1.2507.23, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.2.2510.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.3.2512.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.3.2411.132, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://advisory.splunk.com/advisories/SVD-2026-0608

References (1)

Vendor Advisory

Source: cverecord

https://advisory.splunk.com/advisories/SVD-2026-0608

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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