#VU82662 Open redirect in Django Grappelli - CVE-2021-46898

Vulnerability identifier: #VU82662

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46898

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Django Grappelli
Web applications / Modules and components for CMS

Vendor: Vonautomatisch

Description

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

The vulnerability exists due to improper sanitization of user-supplied data in views/switch.py when handling URL that starts with "//" characters instead of protocol name. 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
Install updates from vendor's website.

Vulnerable software versions

Django Grappelli: 2.1 - 2.15.1

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External links
https://github.com/sehmaschine/django-grappelli/commit/4ca94bcda0fa2720594506853d85e00c8212968f
https://github.com/sehmaschine/django-grappelli/pull/976
https://github.com/sehmaschine/django-grappelli/compare/2.15.1...2.15.2
https://github.com/sehmaschine/django-grappelli/issues/975

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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.