Umbraco.CMS.File.Upload.Stored.XSS

description-logoDescription

This indicates an attack attempt to exploit a Cross-Site Scripting Vulnerability in Umbraco CMS.
This vulnerability is due to insufficient validation of the file extension of uploaded files. A remote authenticated attacker can exploit this vulnerability by uploading a malicious SVG file. Successful exploitation could result in arbitrary script execution in the target user's browser.

affected-products-logoAffected Products

Umbraco CMS 8.9.1 and prior

Impact logoImpact

System Compromise: Remote attackers can execute arbitrary script code in the context of the affected application.

recomended-action-logoRecommended Actions

Umbraco has not released an advisory or patch regarding this vulnerability.

Telemetry logoTelemetry

Coverage

IPS (Regular DB)
IPS (Extended DB)

Version Updates

Date Version Detail
2021-04-29 18.070 Default_action:pass:drop
2021-04-21 18.063