CVE-2025-13473 Username enumeration through timing difference in mod_wsgi authentication handler
Remote attackers can enumerate valid usernames via timing differences in the mod_wsgi authentication handler, requiring specific configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-13473?
CVE-2025-13473 is a medium-severity vulnerability in Djangoproject Django, published on 3 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-208
Which versions are affected by CVE-2025-13473?
8 open source packages ship an affected version, including django and Django. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
django Bitnami | From 4.2.0 | 4.2.28, 5.2.11, 6.0.2 |
django PyPI | From 4.2 | 4.2.28, 5.2.11, 6.0.2 |
django PyPI | From 4.2a1 | 4.2.28 |
django PyPI | From 5.2a1 | 5.2.11 |
django PyPI | From 6.0a1 | 6.0.2 |
Django PyPI | From 4.2a1 | 4.2.28 |
2 more packages
Django PyPI | From 5.2a1 | 5.2.11 |
Django PyPI | From 6.0a1 | 6.0.2 |
Products include Djangoproject Django.
How do I fix CVE-2025-13473?
Upgrade django to a fixed version for your release line: 4.2.28, 5.2.11 or 6.0.2.
Is CVE-2025-13473 being exploited?
There is no known exploitation of CVE-2025-13473 in the wild and no public exploit code.
Other vulnerabilities in Djangoproject Django
- CVE-2026-4277 Privilege abuse in GenericInlineModelAdmin
- CVE-2024-53908 Django SQL injection in HasKey(lhs, rhs) on Oracle
- CVE-2024-42005 Django SQL injection vulnerability
- CVE-2023-31047 Django bypasses validation when using one form field to upload multiple files
- CVE-2022-34265 Django `Trunc()` and `Extract()` database functions vulnerable to SQL Injection
Sources
Also known as BIT-django-2025-13473, DEBIAN-CVE-2025-13473, ECHO-73f1-09ff-6652, GHSA-2mcm-79hx-8fxw, MINI-2vh8-3mj3-4v8c, PYSEC-2026-42.