CVE-2021-33571

mediumpriority · track · 32EPSS 0.053 · 93 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
5.26% (93rd) EPSS
CVSS 5 · medium
Is it mine?
30 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-23

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+..) .

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedpython-django20-0:2.0.13-16.el8ost.1.src as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2021:3490
  • Fixedpython3-django20-0:2.0.13-16.el8ost.1.noarch as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2021:3490
  • Fixedpython-django20-0:2.0.13-16.el8ost.1.src as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2021:5070
  • Fixedpython-django20-bash-completion-0:2.0.13-16.el8ost.1.noarch as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2021:5070
  • Fixedpython3-django20-0:2.0.13-16.el8ost.1.noarch as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2021:5070
  • Fixedpython312-Django6-0:6.0-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython312-Django6-0:6.0-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython312-Django6-0:6.0-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython312-Django6-0:6.0-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython313-Django6-0:6.0-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython313-Django6-0:6.0-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython313-Django6-0:6.0-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedpython313-Django6-0:6.0-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Workaroundpython-django20-0:2.0.13-16.el8ost.1.src as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundpython3-django20-0:2.0.13-16.el8ost.1.noarch as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundpython-django20-0:2.0.13-16.el8ost.1.src as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundpython-django20-bash-completion-0:2.0.13-16.el8ost.1.noarch as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundpython3-django20-0:2.0.13-16.el8ost.1.noarch as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · SUSE Product Security
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · Red Hat Product Security US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-918USprimaryCWE-918USCWE-918USCWE-918US
04

affected products (30)

Products and version ranges known to be affected.

showing 20 of 30
05

advisories (6)

Vendor and ecosystem advisories describing this.

  • RHSA-2021:3490Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 (python-django20) security update2021-09-15csaf · redhat_csafUS

    An update for python-django20 is now available for Red Hat OpenStack Platform 16.2 (Train). Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • RHSA-2021:5070Red Hat Security Advisory: Red Hat OpenStack Platform 16.1 (python-django20) security update2021-12-09csaf · redhat_csafUS

    An update for python-django20 is now available for Red Hat OpenStack Platform 16.1 (Train). Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • openSUSE-SU-2026:10005-1python312-Django6-6.0-1.1 on GA media2026-01-03csaf · suse_csafDE

    python312-Django6-6.0-1.1 on GA media

  • GHSA-p99v-5w3c-jqq9Django Access Control Bypass possibly leading to SSRF, RFI, and LFI attacks 2021-06-10ghsa · osvUS

    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+..) .

  • BIT-django-2021-335712024-03-06vendor · osvUS

    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+..) .

  • PYSEC-2021-992021-06-08vendor · osvUS

    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+..) .

06

also known as (8)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvnvdredhat_csafsuse_csafNVDCVE.orgMITRE
published 2021-06-08modified 2026-06-17
09

references (34)

External citations — patches, advisories, analysis.

scry

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