Is CVE-2021-33571 in the CISA KEV catalog?

No. CVE-2021-33571 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33571?

CVE-2021-33571 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-33571?

CVE-2021-33571 has an EPSS score of 3.06% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33571?

Upgrade python-django on debian 11 to 2:2.2.24-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-33571

HIGHEPSS 86th pctl

7.5

CVSS v3

NVD

Description

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+..) .

CWE-918Server-Side Request Forgery (SSRF)

How to fix

Remediation Available

python-djangoDebian

Fixed in:2:2.2.24-1CVE-2021-33571

python-djangoUbuntu

Fixed in:1:1.11.11-1ubuntu1.14USN-4975-1

Fixed in:2:2.2.12-1ubuntu0.7USN-4975-1

python3-djangoUbuntu

Fixed in:1:1.11.11-1ubuntu1.14USN-4975-1

Fixed in:2:2.2.12-1ubuntu0.7USN-4975-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

3.06%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Patch2

Third-Party Advisory2

Other references4

Related Vulnerabilities

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-21893	High	8.2	100%	KEV + Ransom	-
CVE-2021-40438	Critical	9.0	100%	KEV	Fix
CVE-2021-34473	Critical	9.1	100%	KEV + Ransom	Fix
CVE-2021-26855	Critical	9.1	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-41040	High	8.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.