Open redirect in Werkzeug - CVE-2020-28724
Published: November 18, 2020 / Updated: November 25, 2020
Vulnerability identifier: #VU48651
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-28724
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data within the double slash in the URL. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
Affected software
Werkzeug
Ubuntu
python-werkzeug (Ubuntu package)
python3-werkzeug (Ubuntu package)
Ubuntu
python-werkzeug (Ubuntu package)
python3-werkzeug (Ubuntu package)
How to mitigate CVE-2020-28724
Install updates from vendor's website.
Werkzeug - update to 0.11.6
python-werkzeug (Ubuntu package) - addressed in versions 0.10.4+dfsg1-1ubuntu1.2, 0.14.1+dfsg1-1ubuntu0.1
python3-werkzeug (Ubuntu package) - addressed in versions 0.10.4+dfsg1-1ubuntu1.2, 0.14.1+dfsg1-1ubuntu0.1
python-werkzeug (Ubuntu package) - addressed in versions 0.10.4+dfsg1-1ubuntu1.2, 0.14.1+dfsg1-1ubuntu0.1
python3-werkzeug (Ubuntu package) - addressed in versions 0.10.4+dfsg1-1ubuntu1.2, 0.14.1+dfsg1-1ubuntu0.1