Umbraco: Security Vulnerabilities
Umbraco Forms version 4.0.0 up to and including 8.7.5 and below are vulnerable to a security flaw that could lead to a remote code execution attack and/or arbitrary file deletion. A vulnerability occurs because validation of the file extension is performed after the file has been stored in a temporary directory. By default, files are stored within the application directory structure at %BASEDIR%/APP_DATA/TEMP/FileUploads/. Whilst access to this directory is restricted by the root web.config file, it is possible to override this restriction by uploading another specially crafted web.config file to the temporary directory. It is possible to exploit this flaw to upload a malicious script file to execute arbitrary code and system commands on the server.
CVSS Score
9.8
EPSS Score
0.027
Published
2021-08-25
Umbraco CMS before 7.15.7 is vulnerable to Open Redirection due to insufficient url sanitization on booting.aspx.
CVSS Score
6.1
EPSS Score
0.007
Published
2021-06-28
A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user can inject arbitrary JavaScript code into iframes when editing content using the TinyMCE rich-text editor, as TinyMCE is configured to allow iframes by default in Umbraco CMS.
CVSS Score
5.4
EPSS Score
0.007
Published
2020-12-30
A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user authorized to upload media can upload a malicious .svg file which act as a stored XSS payload.
CVSS Score
5.4
EPSS Score
0.671
Published
2020-12-30
An authenticated path traversal vulnerability exists during package installation in Umbraco CMS <= 8.9.1 or current, which could result in arbitrary files being written outside of the site home and expected paths when installing an Umbraco package.
CVSS Score
6.5
EPSS Score
0.094
Published
2020-12-30
Editors/LogViewerController.cs in Umbraco through 8.9.1 allows a user to visit a logviewer endpoint even if they lack Applications.Settings access.
CVSS Score
4.3
EPSS Score
0.009
Published
2020-12-02
This affects all versions of package UmbracoForms. When using the default configuration for upload forms, it is possible to upload arbitrary file types. The package offers a way for users to mitigate the issue. The users of this package can create a custom workflow and frontend validation that blocks certain file types, depending on their security needs and policies.
CVSS Score
5.4
EPSS Score
0.009
Published
2020-07-28
Umbraco CMS 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Package functionality.
CVSS Score
6.5
EPSS Score
0.021
Published
2020-03-16
Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.
CVSS Score
8.8
EPSS Score
0.023
Published
2020-03-16
Umbraco CMS 8.2.2 allows CSRF to enable/disable or delete user accounts.
CVSS Score
4.3
EPSS Score
0.01
Published
2020-01-23