CVE-2020-28724
python-werkzeug: open redirect via double slash in the URL
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 6, 2015
Updated · November 1, 2026
Description
An open redirect flaw was found in the WSGI library python-werkzeug. When URL_PATH starts with a double slash, followed by an arbitrary URL without a scheme, python-werkzeug could redirect applications to that arbitrary URL. This flaw allows an attacker to use this technique to redirect victims to phishing websites controlled by an attacker or to use this flaw to chain vulnerabilities.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE-601 · URL Redirection to Untrusted Site