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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.

ghsa
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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.

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