CVE-2025-13473: Django Django Has Observable Timing Discrepancy Vulnerability

LOW
Advisory Identifier: GHSA-2mcm-79hx-8fxw
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CWE-208
Published
Advisory Summary

CVE-2025-13473 is a LOW django has observable timing discrepancy vulnerability (CWE-208: Observable Timing Discrepancy) affecting Django libraries in the PyPI ecosystem. The issue involves django has observable timing discrepancy. Remediation is available by upgrading affected packages to version 6.0.2, 5.2.11, 4.2.28.

CVE-2025-13473 at a Glance

CVE Identifier CVE-2025-13473
GHSA Identifier GHSA-2mcm-79hx-8fxw
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-208: Observable Timing Discrepancy
Affected Product Django
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2025-13473

To remediate this vulnerability, upgrade all affected Django dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Django fixed: 6.0.2 
pip install Django>=6.0.2
Django fixed: 5.2.11 
pip install Django>=5.2.11
Django fixed: 4.2.28 
pip install Django>=4.2.28
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show Django

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-13473, inspect your installed packages using pip:

pip show Django

Analyze the terminal output to locate any version of Django in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.0.2), your application is affected.

Note: The pip show Django command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-208: Observable Timing Discrepancy, where two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. In Django, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28. The `django.contrib.auth.handlers.modwsgi.check_password()` function for authentication via `mod_wsgi` allows remote attackers to enumerate users via a timing attack. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Stackered for reporting this issue.

CVE-2025-13473 Affected Django Versions

3 component(s)
Fixed Versions:
6.0.25.2.114.2.28
Product / Package Ecosystem Affected Versions Fixed Version
Django
pypi/Django
PyPI
≥ 6.0a1
< 6.0.2
6.0.2
Django
pypi/Django
PyPI
≥ 5.2a1
< 5.2.11
5.2.11
Django
pypi/Django
PyPI
≥ 4.2a1
< 4.2.28
4.2.28

References

NVD — CVE-2025-13473 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13473
Django Release RELEASE
https://docs.djangoproject.com/en/dev/releases/security
Django Source Repository REPOSITORY
https://github.com/django/django
Django Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-42.yaml
groups.google.com/g/django-announce WEB
https://groups.google.com/g/django-announce
Django Release RELEASE
https://www.djangoproject.com/weblog/2026/feb/03/security-releases

Frequently Asked Questions

What is CVE-2025-13473?
CVE-2025-13473 is a security vulnerability in Django involving Django has Observable Timing Discrepancy under CWE-208: Observable Timing Discrepancy.
Which Django versions are affected?
Affected versions include releases prior to 6.0.2, 5.2.11, 4.2.28 across affected packages: Django.
What version fixes CVE-2025-13473?
Upgrading to 6.0.2, 5.2.11, 4.2.28 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Django affected?
Yes, Django is affected in releases prior to 6.0.2, 5.2.11, 4.2.28. Upgrade your dependency to 6.0.2, 5.2.11, 4.2.28 or later.
What CWE is associated with CVE-2025-13473?
CVE-2025-13473 is classified under CWE-208: Observable Timing Discrepancy (Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.).
How can I check PyPI dependencies for CVE-2025-13473?
Run the dependency tree command: 'pip show Django'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2mcm-79hx-8fxw",
  "modified" : "2026-06-05T16:23:51Z",
  "published" : "2026-02-03T15:30:23Z",
  "aliases" : [ "CVE-2025-13473" ],
  "summary" : "Django has Observable Timing Discrepancy",
  "details" : "An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.\n\nThe `django.contrib.auth.handlers.modwsgi.check_password()` function for authentication via `mod_wsgi` allows remote attackers to enumerate users via a timing attack. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\n\nDjango would like to thank Stackered for reporting this issue.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Django"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0a1"
      }, {
        "fixed" : "6.0.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Django"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.2a1"
      }, {
        "fixed" : "5.2.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Django"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.2a1"
      }, {
        "fixed" : "4.2.28"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-13473"
  }, {
    "type" : "WEB",
    "url" : "https://docs.djangoproject.com/en/dev/releases/security"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/django/django"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-42.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/django-announce"
  }, {
    "type" : "WEB",
    "url" : "https://www.djangoproject.com/weblog/2026/feb/03/security-releases"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-208" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-03T19:22:54Z",
    "nvd_published_at" : "2026-02-03T15:16:11Z"
  }
}