Headline
GHSA-5955-cwv4-h7qh: Umbraco has a Potential Code Execution Risk When Viewing SVG Files in Full Screen in Backoffice
Impact
There is a potential risk of code execution for Backoffice users when they “preview” SVG files in full screen mode.
Workarounds
Server-side file validation is available to strip script tags from file’s content during the file upload process.
Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.