What’s Vulnerable › Vulnerabilities

CVE-2024-21520

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-26 · updated 2026-06-17
• Weakness: CWE-79

Description

Versions of the package djangorestframework before 3.15.2 are vulnerable to Cross-site Scripting (XSS) via the break_long_headers template filter due to improper input sanitization before splitting and joining with <br> tags.

Affected products

• Django-Rest-Framework Django Rest Framework: before 3.15.2 — fixed in 3.15.2

How to fix

Upgrade to a fixed version: Django-Rest-Framework Django Rest Framework 3.15.2. Check the vendor advisory for mitigations.

References

• https://github.com/encode/django-rest-framework/commit/3b41f0124194430da957b119712978fa2266b642
• https://github.com/encode/django-rest-framework/pull/9435
• https://security.snyk.io/vuln/SNYK-PYTHON-DJANGORESTFRAMEWORK-7252137
• https://github.com/encode/django-rest-framework/commit/3b41f0124194430da957b119712978fa2266b642
• https://github.com/encode/django-rest-framework/compare/3.15.1...3.15.2
• https://github.com/encode/django-rest-framework/pull/9435
• https://security.snyk.io/vuln/SNYK-PYTHON-DJANGORESTFRAMEWORK-7252137

Get alerted when CVE-2024-21520 or the next vulnerability affects your stack