Persistent Cross-Site Scripting through the ‘module’ Tag in a View in Splunk Enterprise
Advisory ID: SVD-2023-0203
CVE ID: CVE-2023-22933
Last Update: 2023-02-14
CVSSv3.1 Score: 8.0, High
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Bug ID: SPL-228264
In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, a View allows for Cross-Site Scripting (XSS) in an extensible mark-up language (XML) View through the ‘layoutPanel’ attribute in the ‘module’ tag’. The vulnerability affects instances with Splunk Web enabled.
For Splunk Enterprise, upgrade versions to 8.1.13, 8.2.10, 9.0.4, or higher.
For Splunk Cloud Platform, Splunk is actively patching and monitoring the Splunk Cloud instances.
|Product||Version||Component||Affected Version||Fix Version|
|Splunk Enterprise||8.1||Splunk Web||8.1.12 and lower||8.1.13|
|Splunk Enterprise||8.2||Splunk Web||8.2.0 to 8.2.9||8.2.10|
|Splunk Enterprise||9.0||Splunk Web||9.0. to 9.0.3||9.0.4|
|Splunk Cloud Platform||-||Splunk Web||9.0.2208 and lower||9.0.2209|
Mitigations and Workarounds
If users do not log in to Splunk Web on indexers in a distributed environment, disable Splunk Web on those indexers. See Disable unnecessary Splunk Enterprise components and the web.conf configuration specification file for more information on disabling Splunk Web.
This search enumerates all Splunk accounts with administrative rights on an instance which might have been given maliciously to lower-privileged users as a result of this vulnerability. The search deliberately ignores the default admin account since this account is assumed to be present.
Splunk rated the vulnerability as High, 8.0, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
If the Splunk Enterprise instance does not run Splunk Web, there is no impact and the severity is Informational.
Danylo Dmytriiev (DDV_UA)