CVE-2024-29041

medium

Description

Express.js minimalist web framework for node. Versions of Express.js prior to 4.19.0 and all pre-release alpha and beta versions of 5.0 are affected by an open redirect vulnerability using malformed URLs. When a user of Express performs a redirect using a user-provided URL Express performs an encode [using `encodeurl`](https://github.com/pillarjs/encodeurl) on the contents before passing it to the `location` header. This can cause malformed URLs to be evaluated in unexpected ways by common redirect allow list implementations in Express applications, leading to an Open Redirect via bypass of a properly implemented allow list. The main method impacted is `res.location()` but this is also called from within `res.redirect()`. The vulnerability is fixed in 4.19.2 and 5.0.0-beta.3.

References

https://github.com/koajs/koa/issues/1800

https://github.com/expressjs/express/security/advisories/GHSA-rv95-896h-c2vc

https://github.com/expressjs/express/pull/5539

https://github.com/expressjs/express/commit/0b746953c4bd8e377123527db11f9cd866e39f94

https://github.com/expressjs/express/commit/0867302ddbde0e9463d0564fea5861feb708c2dd

https://expressjs.com/en/4x/api.html#res.location

Details

Source: Mitre, NVD

Published: 2024-03-25

Updated: 2024-03-26

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Severity: Medium