CVE-2025-13473

Username enumeration through timing difference in mod_wsgi authentication handler

Published Feb 3, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4484-1 python-django security update
Debian DSA Debian DSA DSA-6150-1 python-django security update
Github GHSA Github GHSA GHSA-2mcm-79hx-8fxw Django has Observable Timing Discrepancy
Ubuntu USN Ubuntu USN USN-8009-1 Django vulnerabilities
History
Type Values Removed Values Added
CPEs cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Djangoproject
Djangoproject django
Vendors & Products Djangoproject
Djangoproject django
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Username enumeration through timing difference in mod_wsgi authentication handler
Weaknesses CWE-208
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
DSF
Published
Updated
Feb 3, 2026, 4:19 PM
Reserved
Nov 20, 2025, 11:44 AM
Status
Analyzed
Published
Feb 3, 2026, 3:16 PM
Modified
Jun 17, 2026, 8:34 AM
Severity
Low
Public date
Feb 3, 2026, 2:32 PM