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Fencer Vulns
medium 5.3

CVE-2025-13473 json

Username enumeration through timing difference in mod_wsgi authentication handler

published 2026-02-03 9 mo ago modified 2026-09-10 59 d ago also BIT-django-2025-13473 , EUVD-2025-206740 , GHSA-2mcm-79hx-8fxw , PYSEC-2026-42

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi django 4.2.28, 5.2.11, 6.0.2
  • bitnami django 4.2.28, 5.2.11, 6.0.2
  • djangoproject Django 4.2.28, 5.2.11, 6.0.2
  • python-django Debian 12 3:3.2.25-0+deb12u2
  • python-django Debian 13 3:4.2.28-0+deb13u1
  • python-django Debian 14 3:4.2.28-1

debian advisories DEBIAN-CVE-2025-13473

  • python-django Ubuntu 22.04 LTS 2:3.2.12-2ubuntu1.25
  • python-django Ubuntu 24.04 LTS 3:4.2.11-1ubuntu1.14
  • python-django Ubuntu 25.10 3:5.2.4-1ubuntu2.3
  • python-django Ubuntu 26.04 LTS 3:5.2.9-0ubuntu3
  • python-django Ubuntu Pro 14.04 LTS 1.6.11-0ubuntu1.3+esm10
  • python-django Ubuntu Pro 16.04 LTS 1.8.7-1ubuntu5.15+esm11
  • python-django Ubuntu Pro 18.04 LTS 1:1.11.11-1ubuntu1.21+esm14
  • python-django Ubuntu Pro 20.04 LTS 2:2.2.12-1ubuntu0.29+esm7

ubuntu advisories UBUNTU-CVE-2025-13473

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-Django SLE Module for Package Hub 15 SP7, openSUSE Leap 15.6 4.2.11-150600.3.47.1

suse advisories SUSE-SU-2026:0440-1

  • python-Django5 openSUSE Tumbleweed 5.2.16-1.1
  • python-Django4 openSUSE Tumbleweed 4.2.28-1.1
  • python-Django openSUSE Leap 16.0 5.2.4-bp160.5.1
  • python-Django openSUSE Tumbleweed 5.2.11-1.1
  • python-Django6 openSUSE Tumbleweed 6.0.2-1.1

opensuse advisories openSUSE-SU-2026:11270-1openSUSE-SU-2026:10247-1openSUSE-SU-2026:20184-1openSUSE-SU-2026:10160-1openSUSE-SU-2026:10145-1

  • py3-django Alpine 3.24, Alpine 3.23 4.2.28-r0

alpine advisories ALPINE-CVE-2025-13473

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-13473 updated cvss 5.3

Django: Django: User enumeration via timing attack in mod_wsgi authentication

  • Red Hat Ansible Automation Platform 2 automation-controller, ansible-automation-platform-24/de-minimal-rhel8, ansible-automation-platform-24/de-minimal-rhel9, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/de-minimal-rhel8, ansible-automation-platform-25/de-minimal-rhel9, +3 more Red Hat Discovery 2 discovery/discovery-server-rhel9 Red Hat Satellite 6 satellite/iop-advisor-backend-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi django
>=6.0a1, <6.0.2
>=5.2a1, <5.2.11
>=4.2a1, <4.2.28
>=4.2, <4.2.28
>=5.2, <5.2.11
>=6.0, <6.0.2
6.0.2
5.2.11
4.2.28
bitnami django
>=4.2.0, <4.2.28
>=5.2.0, <5.2.11
>=6.0.0, <6.0.2
4.2.28
5.2.11
6.0.2

Affected products

  • djangoproject Django

Classification

Weakness
  • CWE-208 Observable Timing Discrepancy
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.