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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2021-08-25T21:16:01
Updated: 2024-08-04T01:16:03.860Z
Reserved: 2021-07-21T00:00:00
Link: CVE-2021-37334
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-08-25T22:15:07.123
Modified: 2024-11-21T06:14:58.420
Link: CVE-2021-37334
Redhat
No data.