What’s Vulnerable › Vulnerabilities

CVE-2021-31542: Path Traversal in Django

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-05 · updated 2026-06-17
• Weakness: CWE-22

Description

In Django 2.2 before 2.2.21, 3.1 before 3.1.9, and 3.2 before 3.2.1, MultiPartParser, UploadedFile, and FieldFile allowed directory traversal via uploaded files with suitably crafted file names.

Affected products

• Debian Linux: 9.0
• Django: from 2.2 before 2.2.21; from 3.1 before 3.1.9; from 3.2 before 3.2.1 — fixed in 2.2.21, 3.1.9, 3.2.1
• Fedoraproject Fedora: 34, 35
• Pypi Django: from 2.2 before 2.2.21; from 3.1 before 3.1.9; from 3.2 before 3.2.1; 2.2, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5 (+25) — fixed in 2.2.21, 3.1.9, 3.2.1

How to fix

Upgrade to a fixed version: Django 2.2.21, 3.1.9, 3.2.1; Pypi Django 2.2.21, 3.1.9, 3.2.1. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/05/04/3
• https://docs.djangoproject.com/en/3.2/releases/security/
• https://github.com/django/django/commit/04ac1624bdc2fa737188401757cf95ced122d26d
• https://github.com/django/django/commit/25d84d64122c15050a0ee739e859f22ddab5ac48
• https://github.com/django/django/commit/c98f446c188596d4ba6de71d1b77b4a6c5c2a007
• https://groups.google.com/forum/#%21forum/django-announce
• https://lists.debian.org/debian-lts-announce/2021/05/msg00005.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVKYPHR3TKR2ESWXBPOJEKRO2OSJRZUE/
• https://security.netapp.com/advisory/ntap-20210618-0001/
• https://www.djangoproject.com/weblog/2021/may/04/security-releases/
• http://www.openwall.com/lists/oss-security/2021/05/04/3

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