Home/CVE/In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_
CVE

CVE-2021-33571

In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_

In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_ipv46_address do not prohibit leading zero characters in octal literals. This may allow a bypass of access control that is based on IP addresses. (validate_ipv4_address and validate_ipv46_address are unaffected with Python 3.9.5+..) .

HIGH · CVSS 7.5 EPSS 0.00015
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-918Server-Side Request Forgery (SSRF)
▤

Affected Products & Versions

4
djangoproject django>= 2.2 and < 2.2.24
djangoproject django>= 3.0 and < 3.1.12
djangoproject django>= 3.2 and < 3.2.4
fedoraproject fedoraall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI django HIGH fixed in 2.2.24
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumDjango Framework Exceptions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Jun 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

12
suse-csafopenSUSE-SU-2026:10005-1
suse-csafopenSUSE-SU-2024:14208-1
suse-csafopenSUSE-SU-2024:11205-1
suse-csafopenSUSE-SU-2024:13887-1
suse-csafopenSUSE-SU-2023:0005-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://docs.djangoproject.com/en/3.2/releases/security/PatchVendor Advisory
https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
https://groups.google.com/g/django-announce/c/sPyjSKMi8EoMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
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