What is CVE-2019-3498?

CVE-2019-3498 is a medium-severity vulnerability in Djangoproject Django, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2019-01-09.

How severe is CVE-2019-3498?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2019-3498 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Djangoproject Django

CVE-2019-3498

In Django 1.11.x before 1.11.18, 2.0.x before 2.0.10, and 2.1.x before 2.1.5, an Improper Neutralization of Special Elements in Output Used by a Downstream Component issue exists in django.views.defaults.page_not_found(), leading to content spoofing (in a 404 error page) if a user fails to recognize that a crafted URL has malicious content.

Published 2019-01-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.034 (88.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Djangoproject Django
Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Debian Linux — versions 8.0, 9.0
Fedoraproject Fedora — versions 28

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

Public proof-of-concept exploits

References

groups.google.com/forum/
docs.djangoproject.com/en/dev/releases/security/ (Patch, Vendor Advisory)
usn.ubuntu.com/3851-1/ (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/106453 (VDB Entry, Third Party Advisory, vdb-entry)
lists.debian.org/debian-lts-announce/2019/01/msg00005.html (mailing-list, Mailing List, Third Party Advisory)
www.djangoproject.com/weblog/2019/jan/04/security-releases/ (Patch, Vendor Advisory)
www.debian.org/security/2019/dsa-4363 (vendor-advisory, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2019-3498?: CVE-2019-3498 is a medium-severity vulnerability in Djangoproject Django, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2019-01-09.
How severe is CVE-2019-3498?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2019-3498 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.