SecuriTricks - CVE-2025-27556

Description

An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and django.views.i18n.set_language are subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.

Product(s) Impacted

Vendor	Product	Versions
Django	Django	<5.1, <5.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-770

Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	django	django	<5.1	8	/	/	/	/	/	/
a	django	django	<5.0	14	/	/	/	/	/	/

References

https://docs.djangoproject.com/en/dev/releases/security/

https://groups.google.com/g/django-announce

https://www.djangoproject.com/weblog/2025/apr/02/security-releases/

http://www.openwall.com/lists/oss-security/2025/04/02/2

CVSS Score

5.8 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: CHANGED
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

View Vector String

Timeline

Published: April 2, 2025, 1:15 p.m.
Last Modified: April 2, 2025, 10:15 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

cve@mitre.org

CVE-2025-27556