Bug 2436343 (CVE-2025-13473)

Summary:	CVE-2025-13473 Django: Django: User enumeration via timing attack in mod_wsgi authentication
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	anthomas, brasmith, caswilli, cmyers, cochase, dnakabaa, dranck, dschmidt, ehelms, erezende, ggainey, jmitchel, juwatts, jwong, kaycoth, kshier, lcouzens, mattdavi, mhulan, nmoumoul, omaciel, osousa, pbohmill, pcreech, rchan, smallamp, smcdonal, stcannon, teagle, tmalecek, ttakamiy, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Django. A remote attacker can exploit a timing attack vulnerability in the `django.contrib.auth.handlers.modwsgi.check_password()` function, which is used for authentication via the Apache `mod_wsgi` module. This allows the attacker to determine valid usernames on the system, leading to information disclosure.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-02-03 15:01:44 UTC

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.