#VU88532 Open redirect in Express - CVE-2024-29041

Vulnerability identifier: #VU88532

Vulnerability risk: Medium

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:Green]

CVE-ID: CVE-2024-29041

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Express
Web applications / JS libraries

Vendor: Express.js

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 malformed URLs. 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

Express: 4.19.0 - 4.19.1

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External links
https://github.com/expressjs/express/security/advisories/GHSA-rv95-896h-c2vc
https://github.com/koajs/koa/issues/1800
https://github.com/expressjs/express/pull/5539
https://github.com/expressjs/express/commit/0867302ddbde0e9463d0564fea5861feb708c2dd
https://github.com/expressjs/express/commit/0b746953c4bd8e377123527db11f9cd866e39f94
https://expressjs.com/en/4x/api.html#res.location

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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.