The frontend company self-service editing feature relies on a template-level visibility flag to hide the edit form for company records a visitor does not own, but the corresponding write operation does not repeat this ownership check on the server side. As a result, a visitor who knows the identifier of a company record from the public directory can submit a modified update request for that record directly and overwrite its data, without the application ever confirming that the visitor owns it.

The frontend company self-service editing feature relies on a template-level visibility flag to hide the edit form for company records a visitor does not own, but the corresponding write operation does not repeat this ownership check on the server side. As a result, a visitor who knows the identifier of a company record from the public directory can submit a modified update request for that record directly and overwrite its data, without the application ever confirming that the visitor owns it.

Ein Angreifer kann mehrere Schwachstellen in verschiedenen TYPO3 Extensions ausnutzen, um beliebigen Programmcode auszuführen, SQL-Injection durchzuführen, erweiterte Berechtigungen zu erlangen, Daten zu manipulieren, sensible Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen oder einen Denial-of-Service-Zustand auszulösen.