Improve file uploads mechanism

The elementor library is not properly sanitized and checked for any threat via the upload mechanism.

This vulnerability affects the following application versions:

• Elementor Website Builder 3.5.0
• Elementor Website Builder 3.5.0-beta1
• Elementor Website Builder 3.5.0-beta2
• Elementor Website Builder 3.5.0-beta3
• Elementor Website Builder 3.5.0-beta4
• Elementor Website Builder 3.5.0-beta5
• Elementor Website Builder 3.5.0-beta7
• Elementor Website Builder 3.5.0-beta8
• Elementor Website Builder 3.5.0-dev50
• Elementor Website Builder 3.5.0-dev51
• Elementor Website Builder 3.5.1
• Elementor Website Builder 3.5.2
• Elementor Website Builder 3.5.3
• Elementor Website Builder 3.5.4
• Elementor Website Builder 3.5.5
• Elementor Website Builder 3.5.6
• Elementor Website Builder 3.6.0
• Elementor Website Builder 3.6.0-beta1
• Elementor Website Builder 3.6.0-beta2
• Elementor Website Builder 3.6.0-beta3
• Elementor Website Builder 3.6.0-beta4
• Elementor Website Builder 3.6.0-beta5
• Elementor Website Builder 3.6.0-dev1
• Elementor Website Builder 3.6.0-dev2
• Elementor Website Builder 3.6.0-dev3
• Elementor Website Builder 3.6.0-dev4
• Elementor Website Builder 3.6.0-dev5
• Elementor Website Builder 3.6.0-dev6
• Elementor Website Builder 3.6.0-dev7
• Elementor Website Builder 3.6.0-dev8
• Elementor Website Builder 3.6.0-dev9
• Elementor Website Builder 3.6.0-dev10
• Elementor Website Builder 3.6.0-dev11
• Elementor Website Builder 3.6.0-dev13
• Elementor Website Builder 3.6.0-dev14
• Elementor Website Builder 3.6.0-dev16
• Elementor Website Builder 3.6.0-dev17
• Elementor Website Builder 3.6.0-dev18
• Elementor Website Builder 3.6.0-dev19
• Elementor Website Builder 3.6.0-dev20
• Elementor Website Builder 3.6.0-dev21
• Elementor Website Builder 3.6.0-dev22
• Elementor Website Builder 3.6.0-dev24
• Elementor Website Builder 3.6.0-dev25
• Elementor Website Builder 3.6.0-dev26
• Elementor Website Builder 3.6.0-dev27
• Elementor Website Builder 3.6.0-dev28
• Elementor Website Builder 3.6.0-dev29
• Elementor Website Builder 3.6.0-dev30
• Elementor Website Builder 3.6.0-dev31
• Elementor Website Builder 3.6.0-dev32
• Elementor Website Builder 3.6.0-dev33
• Elementor Website Builder 3.6.0-dev34
• Elementor Website Builder 3.6.0-dev35
• Elementor Website Builder 3.6.0-dev36
• Elementor Website Builder 3.6.0-dev37
• Elementor Website Builder 3.6.0-dev38
• Elementor Website Builder 3.6.0-dev39
• Elementor Website Builder 3.6.0-dev40
• Elementor Website Builder 3.6.0-dev41
• Elementor Website Builder 3.6.0-dev42
• Elementor Website Builder 3.6.0-dev43
• Elementor Website Builder 3.6.0-dev44
• Elementor Website Builder 3.6.0-dev45
• Elementor Website Builder 3.6.1
• Elementor Website Builder 3.6.2
• Elementor Website Builder 3.6.3
• Elementor Website Builder 3.6.4
• Elementor Website Builder 3.6.5
• Elementor Website Builder 3.6.6
• Elementor Website Builder 3.6.7
• Elementor Website Builder 3.6.8
• Elementor Website Builder 3.7.0
• Elementor Website Builder 3.7.0-beta1
• Elementor Website Builder 3.7.0-beta2
• Elementor Website Builder 3.7.0-beta3
• Elementor Website Builder 3.7.0-beta4
• Elementor Website Builder 3.7.0-dev1
• Elementor Website Builder 3.7.0-dev2
• Elementor Website Builder 3.7.0-dev3
• Elementor Website Builder 3.7.0-dev4
• Elementor Website Builder 3.7.0-dev5
• Elementor Website Builder 3.7.0-dev6
• Elementor Website Builder 3.7.0-dev7
• Elementor Website Builder 3.7.0-dev8
• Elementor Website Builder 3.7.0-dev9
• Elementor Website Builder 3.7.0-dev10
• Elementor Website Builder 3.7.1
• Elementor Website Builder 3.7.2
• Elementor Website Builder 3.7.3
• Elementor Website Builder 3.7.4
• Elementor Website Builder 3.7.5
• Elementor Website Builder 3.7.6
• Elementor Website Builder 3.7.7
• Elementor Website Builder 3.7.8
• Elementor Website Builder 3.8.0
• Elementor Website Builder 3.8.0-beta1
• Elementor Website Builder 3.8.0-beta2
• Elementor Website Builder 3.8.0-beta3
• Elementor Website Builder 3.8.0-beta4
• Elementor Website Builder 3.8.0-beta5
• Elementor Website Builder 3.8.0-beta6
• Elementor Website Builder 3.8.0-dev1
• Elementor Website Builder 3.8.0-dev2
• Elementor Website Builder 3.8.0-dev3
• Elementor Website Builder 3.8.0-dev4
• Elementor Website Builder 3.8.1
• Elementor Website Builder 3.9.0
• Elementor Website Builder 3.9.0-beta1
• Elementor Website Builder 3.9.0-beta2
• Elementor Website Builder 3.9.0-beta3
• Elementor Website Builder 3.9.0-dev1
• Elementor Website Builder 3.9.0-dev2
• Elementor Website Builder 3.9.0-dev3
• Elementor Website Builder 3.9.0-dev4
• Elementor Website Builder 3.9.1
• Elementor Website Builder 3.9.2
• Elementor Website Builder 3.10.0
• Elementor Website Builder 3.10.0-beta1
• Elementor Website Builder 3.10.0-beta2
• Elementor Website Builder 3.10.0-beta3
• Elementor Website Builder 3.10.0-dev1
• Elementor Website Builder 3.10.1
• Elementor Website Builder 3.10.2
• Elementor Website Builder 3.11.0
• Elementor Website Builder 3.11.0-beta1
• Elementor Website Builder 3.11.0-beta2
• Elementor Website Builder 3.11.0-beta3
• Elementor Website Builder 3.11.0-dev1
• Elementor Website Builder 3.11.0-dev2
• Elementor Website Builder 3.11.0-dev3
• Elementor Website Builder 3.11.1
• Elementor Website Builder 3.11.2
• Elementor Website Builder 3.11.3
• Elementor Website Builder 3.11.4
• Elementor Website Builder 3.11.5
• Elementor Website Builder 3.12.0
• Elementor Website Builder 3.12.0-beta1
• Elementor Website Builder 3.12.0-beta2
• Elementor Website Builder 3.12.0-beta3
• Elementor Website Builder 3.12.0-dev1
• Elementor Website Builder 3.12.0-dev2
• Elementor Website Builder 3.12.0-dev3
• Elementor Website Builder 3.12.0-dev4
• Elementor Website Builder 3.12.1
• Elementor Website Builder 3.12.2
• Elementor Website Builder 3.13.0
• Elementor Website Builder 3.13.0-beta1
• Elementor Website Builder 3.13.0-beta2
• Elementor Website Builder 3.13.0-beta3
• Elementor Website Builder 3.13.0-beta4
• Elementor Website Builder 3.13.0-dev1
• Elementor Website Builder 3.13.0-dev2
• Elementor Website Builder 3.13.0-dev3
• Elementor Website Builder 3.13.0-dev4
• Elementor Website Builder 3.13.1
• Elementor Website Builder 3.13.2
• Elementor Website Builder 3.13.3
• Elementor Website Builder 3.13.4
• Elementor Website Builder 3.14.0
• Elementor Website Builder 3.14.0-beta1
• Elementor Website Builder 3.14.0-beta2
• Elementor Website Builder 3.14.0-beta3
• Elementor Website Builder 3.14.0-beta4
• Elementor Website Builder 3.14.0-beta5
• Elementor Website Builder 3.14.0-dev1
• Elementor Website Builder 3.14.0-dev2
• Elementor Website Builder 3.14.0-dev3
• Elementor Website Builder 3.14.0-dev4
• Elementor Website Builder 3.14.0-dev5
• Elementor Website Builder 3.14.1
• Elementor Website Builder 3.15.0
• Elementor Website Builder 3.15.0-beta1
• Elementor Website Builder 3.15.0-beta2
• Elementor Website Builder 3.15.0-beta3
• Elementor Website Builder 3.15.0-beta4
• Elementor Website Builder 3.15.0-beta5
• Elementor Website Builder 3.15.0-beta6
• Elementor Website Builder 3.15.0-dev1
• Elementor Website Builder 3.15.0-dev2
• Elementor Website Builder 3.15.0-dev3
• Elementor Website Builder 3.15.0-dev4
• Elementor Website Builder 3.15.0-dev5
• Elementor Website Builder 3.15.0-dev6
• Elementor Website Builder 3.15.1
• Elementor Website Builder 3.15.2
• Elementor Website Builder 3.15.3
• Elementor Website Builder 3.16.0
• Elementor Website Builder 3.16.0-beta1
• Elementor Website Builder 3.16.0-beta2
• Elementor Website Builder 3.16.0-beta3
• Elementor Website Builder 3.16.0-beta4
• Elementor Website Builder 3.16.0-dev1
• Elementor Website Builder 3.16.0-dev2
• Elementor Website Builder 3.16.0-dev3
• Elementor Website Builder 3.16.0-dev4
• Elementor Website Builder 3.16.1
• Elementor Website Builder 3.16.2
• Elementor Website Builder 3.16.3
• Elementor Website Builder 3.16.4
• Elementor Website Builder 3.16.5
• Elementor Website Builder 3.16.6
• Elementor Website Builder 3.17.0
• Elementor Website Builder 3.17.0-beta1
• Elementor Website Builder 3.17.0-beta2
• Elementor Website Builder 3.17.0-beta3
• Elementor Website Builder 3.17.0-beta4
• Elementor Website Builder 3.17.0-dev1
• Elementor Website Builder 3.17.0-dev2
• Elementor Website Builder 3.17.0-dev3
• Elementor Website Builder 3.17.0-dev4
• Elementor Website Builder 3.17.1
• Elementor Website Builder 3.17.2
• Elementor Website Builder 3.17.3
• Elementor Website Builder 3.18.0
• Elementor Website Builder 3.18.0-beta1
• Elementor Website Builder 3.18.0-beta2
• Elementor Website Builder 3.18.0-beta3
• Elementor Website Builder 3.18.0-beta4
• Elementor Website Builder 3.18.0-dev1
• Elementor Website Builder 3.18.0-dev2
• Elementor Website Builder 3.18.0-dev3
• Elementor Website Builder 3.18.0-dev4
• Elementor Website Builder 3.18.1