Vulnerability · Published Jun 10, 2026 · Assigned by cisco
CVE-2026-20258Stored Cross-Site Scripting (XSS) through Classic Dashboard in Splunk Enterprise
High 7.1
In plain English
A high-severity cross-site scripting in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.2 – before 10.2.410.0 – before 10.0.79.4 – before 9.4.129.3 – before 9.3.13 |
| Splunk | Splunk Cloud Platform | 10.3.2512 – before 10.3.2512.1110.2.2510 – before 10.2.2510.1510.1.2507 – before 10.1.2507.239.3.2411 – before 9.3.2411.132 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H