Skip to content
Fencer Vulns
medium 6.1

CVE-2024-21520 json

Cross-site Scripting in djangorestframework

published 2024-06-26 2 y ago modified 2026-07-07 4 mo ago also GHSA-gw84-84pc-xp82 , PYSEC-2026-1304 , EUVD-2024-2061

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi djangorestframework 3.15.2
  • n/a djangorestframework 3.15.2
  • django-rest-framework django_rest_framework 3.15.2
  • djangorestframework Debian 14, Debian 13 3.15.2-1

debian advisories DEBIAN-CVE-2024-21520

  • automation-controller-venv-tower ansible automation platform 2.4 4.5.12-1.el8ap
  • automation-controller-venv-tower ansible automation platform 2.4 4.5.12-1.el9ap

red hat advisories RHSA-2024:7312

  • python-djangorestframework openSUSE Tumbleweed 3.16.1-2.1

opensuse advisories openSUSE-SU-2026:10115-1

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-2024-21520 updated cvss 6.1

djangorestframework: Cross-site Scripting (XSS) via break_long_headers

  • Red Hat Ansible Automation Platform 1.2 ansible-tower
    affected: no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 aap-cloud-metrics-collector-container, ansible-automation-platform-25/lightspeed-rhel8 Red Hat Discovery 1 discovery-server-container
    affected: no fix available
  • Red Hat Ansible Automation Platform 2.4 for RHEL 8 automation-controller-venv-tower 4.5.12-1.el8ap Red Hat Ansible Automation Platform 2.4 for RHEL 9 automation-controller-venv-tower 4.5.12-1.el9ap
    fixed: vendor fix RHSA-2024:7312
  • Red Hat Ansible Automation Platform 2 python-django-lifecycle, python3x-django-lifecycle, ansible-automation-platform-25/ee-minimal-rhel8, ansible-automation-platform-24/de-supported-rhel8, ansible-automation-platform-24/ee-supported-rhel9, ansible-automation-platform-25/ansible-builder-rhel8, +4 more Red Hat Ansible Automation Platform 2.4 for RHEL 8 automation-controller 4.5.12-1.el8ap, automation-controller-ui 4.5.12-1.el8ap, automation-controller-cli 4.5.12-1.el8ap, automation-controller-server 4.5.12-1.el8ap Red Hat Ansible Automation Platform 2.4 for RHEL 9 automation-controller 4.5.12-1.el9ap, automation-controller-ui 4.5.12-1.el9ap, automation-controller-cli 4.5.12-1.el9ap, automation-controller-server 4.5.12-1.el9ap
    not affected: vulnerable code not present

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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P
CNA 4.0 2.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi djangorestframework
<3.15.2
3.15.2

Affected products

  • n/a djangorestframework
  • django-rest-framework django_rest_framework

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.