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NextAuth.js default redirect callback vulnerable to open redirects

Moderate severity GitHub Reviewed Published Apr 19, 2022 in nextauthjs/next-auth • Updated Jan 27, 2023

Package

npm next-auth (npm)

Affected versions

< 3.29.2
>= 4.0.0, < 4.3.2

Patched versions

3.29.2
4.3.2

Description

next-auth v3 users before version 3.29.2 are impacted. (We recommend upgrading to v4 in most cases. See our migration guide).next-auth v4 users before version 4.3.2 are impacted. Upgrading to 3.29.2 or 4.3.2 will patch this vulnerability. If you are not able to upgrade for any reason, you can add a configuration to your callbacks option:

// async redirect(url, baseUrl) { // v3
async redirect({ url, baseUrl }) { // v4
    // Allows relative callback URLs
    if (url.startsWith("/")) return new URL(url, baseUrl).toString()
    // Allows callback URLs on the same origin
    else if (new URL(url).origin === baseUrl) return url
    return baseUrl
}

If you already have a redirect callback, make sure that you match the incoming url origin against the baseUrl.

References

@balazsorban44 balazsorban44 published to nextauthjs/next-auth Apr 19, 2022
Published by the National Vulnerability Database Apr 19, 2022
Published to the GitHub Advisory Database Apr 22, 2022
Reviewed Apr 22, 2022
Last updated Jan 27, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(55th percentile)

Weaknesses

Authentication Bypass by Spoofing

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. Learn more on MITRE.

URL Redirection to Untrusted Site ('Open Redirect')

The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. Learn more on MITRE.

CVE ID

CVE-2022-24858

GHSA ID

GHSA-f9wg-5f46-cjmw

Source code

Credits

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