CVE-2026-20258
MEDIUM WAF: High
CVSS 5.4
Published: 2026-06-10
CWE-79
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.
WAF Coverage Analysis
Cross-Site Scripting (XSS)
High WAF Coverage
OWASP: A03:2021 Injection
941xxx - XSS / XXE
Affected Software
| Vendor | Product | Version |
|---|---|---|
| splunk | splunk | 9.3.0 - 9.3.13 |
| splunk | splunk | 9.4.0 - 9.4.12 |
| splunk | splunk | 10.0.0 - 10.0.7 |
| splunk | splunk | 10.2.0 - 10.2.4 |
| splunk | splunk_cloud_platform | 9.3.2411 - 9.3.2411.132 |
| splunk | splunk_cloud_platform | 10.1.2507 - 10.1.2507.23 |
| splunk | splunk_cloud_platform | 10.2.2510 - 10.2.2510.15 |
| splunk | splunk_cloud_platform | 10.3.2512 - 10.3.2512.11 |
References
- advisory.splunk.com (Vendor Advisory)