An issue was discovered in Django 2.2 before 2.2.16, 3.0 before 3.0.10, and 3.1 before 3.1.1 (when Python 3.7+ is used). The intermediate-level directories of the filesystem cache had the system's standard umask rather than 0o077.
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.openwall.com/lists/oss-security/2020/09/01/2
https://usn.ubuntu.com/4479-1/
https://github.com/advisories/GHSA-fr28-569j-53c4
https://www.djangoproject.com/weblog/2020/sep/01/security-releases/
https://groups.google.com/forum/#%21topic/django-announce/zFCMdgUnutU
https://groups.google.com/forum/#%21topic/django-announce/Gdqn58RqIDM
Published: 2020-09-01
Updated: 2026-06-17
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: High
Base Score: 6.9
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Severity: Medium
EPSS: 0.01608