What is CVE-2019-12781?

CVE-2019-12781 is a medium-severity vulnerability in Djangoproject Django, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.3/10. Published 2019-07-01.

How severe is CVE-2019-12781?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Djangoproject Django

CVE-2019-12781

An issue was discovered in Django 1.11 before 1.11.22, 2.1 before 2.1.10, and 2.2 before 2.2.3. An HTTP request is not redirected to HTTPS when the SECURE_PROXY_SSL_HEADER and SECURE_SSL_REDIRECT settings are used, and the proxy connects to Django via HTTPS. In other words, django.http.HttpRequest.scheme has incorrect behavior when a client uses HTTP.

Published 2019-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.017 (76.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.000

Affected products

Djangoproject Django
Canonical Ubuntu Linux — versions 16.04, 18.04, 18.10
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

docs.djangoproject.com/en/dev/releases/security/ (Patch, Vendor Advisory)
groups.google.com/forum/
www.djangoproject.com/weblog/2019/jul/01/security-releases/ (Patch, Vendor Advisory)
www.openwall.com/lists/oss-security/2019/07/01/3 (mailing-list, Patch, Mailing List, Third Party Advisory)
usn.ubuntu.com/4043-1/ (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/109018 (Third Party Advisory, vdb-entry)
security.netapp.com/advisory/ntap-20190705-0002/ (Third Party Advisory)
www.debian.org/security/2019/dsa-4476 (vendor-advisory, Third Party Advisory)
seclists.org/bugtraq/2019/Jul/10 (mailing-list, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2019-12781?: CVE-2019-12781 is a medium-severity vulnerability in Djangoproject Django, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.3/10. Published 2019-07-01.
How severe is CVE-2019-12781?: Medium severity. CVSS v3 base score is 5.3 out of 10.