#VU53615 Open redirect in Flask-Security - CVE-2021-23385

Vulnerability identifier: #VU53615

Vulnerability risk: Low

CVSSv4.0: 1.2 [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/E:U/U:Clear]

CVE-ID: CVE-2021-23385

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Flask-Security
Web applications / Modules and components for CMS

Vendor: Matt Wright

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data. 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.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Flask-Security: 1.1.0 - 3.0.0

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External links
https://snyk.io/vuln/SNYK-PYTHON-FLASKSECURITY-1293234

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.