Insecure processing of uploaded files in Django

Published: 2021-05-04
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-31542
Exploitation vector Network
Public exploit N/A
Vulnerable software
Web applications / CMS

Vendor Django Software Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Arbitrary file upload

EUVDB-ID: #VU52842

Risk: High


CVE-ID: CVE-2021-31542

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: No


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload via the MultiPartParser, UploadedFile, and FieldFile methods. A remote attacker can upload a file with a specially crafted filename containing directory traversal characters and overwrite arbitrary files on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.


Install updates from vendor's website.

Vulnerable software versions

Django: 3.0 - 3.2, 2.2 - 2.2.20

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?