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 10.3.2512.13, 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 cause data exfiltration through classic dashboards by redirecting a victim to an external site using a protocol-relative URL in a drill-down link.<br><br>The vulnerability exists because the URL classifier in classic dashboards only recognizes `http://` and `https://` schemes when checking for external URLs. Protocol-relative URLs such as `//attacker.com` bypass this check entirely, and Splunk Web does not show the external-navigation warning dialog to the victim.
Problem types
Product status
10.0 (custom) before 10.0.7
9.4 (custom) before 9.4.12
9.3 (custom) before 9.3.13
10.2.2510 (custom) before 10.2.2510.15
10.1.2507 (custom) before 10.1.2507.23
9.3.2411 (custom) before 9.3.2411.132
Credits
Tony Tong (tongster)
References
advisory.splunk.com/advisories/SVD-2026-0606