#VU80774 Open redirect in next.js - CVE-2021-37699

Vulnerability identifier: #VU80774

Vulnerability risk: Low

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

CVE-ID: CVE-2021-37699

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
next.js
Server applications / Frameworks for developing and running applications

Vendor: vercel

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
Install updates from vendor's website.

Vulnerable software versions

next.js: 11.0.0 - 11.0.1

---

External links
https://github.com/vercel/next.js/releases/tag/v11.1.0
https://github.com/vercel/next.js/security/advisories/GHSA-vxf5-wxwp-m7g9

---

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.