Vulnerability · Published Feb 3, 2026 · Assigned by DSF
CVE-2025-13473Username enumeration through timing difference in mod_wsgi authentication handler
Medium 5.3
In plain English
A medium-severity security flaw in Django from djangoproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | py3-django | 4.2.28-r0 | ALPINE-CVE-2025-13473 |
| Alpine:v3.24 | py3-django | 4.2.28-r0 | ALPINE-CVE-2025-13473 |
| Debian:12 | python-django | 3:3.2.25-0+deb12u2 | DEBIAN-CVE-2025-13473 |
| Debian:12 | python-django | 3:3.2.25-0+deb12u2 | DSA-6150-1 |
| Debian:13 | python-django | 3:4.2.28-0+deb13u1 | DEBIAN-CVE-2025-13473 |
| Debian:13 | python-django | 3:4.2.28-0+deb13u1 | DSA-6150-1 |
| Debian:14 | python-django | 3:4.2.28-1 | DEBIAN-CVE-2025-13473 |
| PyPI | django | 5.2.11 | GHSA-2mcm-79hx-8fxw |
| PyPI | django | 6.0.2 | GHSA-2mcm-79hx-8fxw |
| PyPI | django | 4.2.28 | GHSA-2mcm-79hx-8fxw |
| PyPI | django | 4.2.28, 5.2.11, 6.0.2 | PYSEC-2026-42 |
| Ubuntu:22.04:LTS | python-django | 2:3.2.12-2ubuntu1.25 | UBUNTU-CVE-2025-13473 |
| Ubuntu:24.04:LTS | python-django | 3:4.2.11-1ubuntu1.14 | UBUNTU-CVE-2025-13473 |
| Ubuntu:25.10 | python-django | 3:5.2.4-1ubuntu2.3 | UBUNTU-CVE-2025-13473 |
| Ubuntu:26.04:LTS | python-django | 3:5.2.9-0ubuntu3 | UBUNTU-CVE-2025-13473 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| djangoproject | Django | 6.0 – before 6.0.25.2 – before 5.2.114.2 – before 4.2.28 |
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- Django security archive vendor-advisory
- Django releases announcements mailing-list
- Django security releases issued: 6.0.2, 5.2.11, and 4.2.28 vendor-advisory