CVE-2026-20258

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

State: Published
Severity: 7.1 High
Published: Jun 10, 2026
Updated: Jun 10, 2026
Reserved: Oct 8, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H	cisco

Weaknesses

CWE-79 The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Affected Products

Product	Versions
Splunk EnterpriseSplunk	10.2 to before 10.2.4Affected 10.0 to before 10.0.7Affected 9.4 to before 9.4.12Affected 9.3 to before 9.3.13Affected
Splunk Cloud PlatformSplunk	10.3.2512 to before 10.3.2512.11Affected 10.2.2510 to before 10.2.2510.15Affected 10.1.2507 to before 10.1.2507.23Affected 9.3.2411 to before 9.3.2411.132Affected

References

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

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