SSRF in Djangoproject Django
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_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+..) .
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.052 (91.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Djangoproject Django
- Fedoraproject Fedora — versions 35
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Vendor Advisory)
- cve@mitre.org (Mailing List, Third Party Advisory)
- cve@mitre.org (Patch, Vendor Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
Frequently asked questions
- What is CVE-2021-33571?
- CVE-2021-33571 is a high-severity vulnerability in Djangoproject Django, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2021-06-08.
- How severe is CVE-2021-33571?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33571 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.