What’s Vulnerable › Vulnerabilities

CVE-2025-13473: Username enumeration through timing difference in mod_wsgi authentication handler

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-03 · updated 2026-06-17
• Weakness: CWE-208

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.

Affected products

• Django: from 4.2 before 4.2.28; from 5.2 before 5.2.11; from 6.0 before 6.0.2 — fixed in 4.2.28, 5.2.11, 6.0.2

How to fix

Upgrade to a fixed version: Django 4.2.28, 5.2.11, 6.0.2. Check the vendor advisory for mitigations.

References

• https://docs.djangoproject.com/en/dev/releases/security/
• https://groups.google.com/g/django-announce
• https://www.djangoproject.com/weblog/2026/feb/03/security-releases/

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