CVE-2020-15242: Next Open Redirect Vulnerability

MODERATE
Advisory Identifier: GHSA-x56p-c8cg-q435
Share
CVSS 4.7
CWE-601
Published
Advisory Summary

CVE-2020-15242 is a MODERATE (CVSS 4.7) open redirect vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Next libraries in the npm ecosystem. The issue involves open redirect in next.js versions. Remediation is available by upgrading affected packages to version 9.5.4.

CVE-2020-15242 at a Glance

CVE Identifier CVE-2020-15242
GHSA Identifier GHSA-x56p-c8cg-q435
Severity MODERATE
CVSS v3.1 Base Score 4.7
CWE Classification CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Affected Product Next
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2020-15242

To remediate this vulnerability, upgrade all affected Next dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

next fixed: 9.5.4 
npm install next@9.5.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls next

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-15242, inspect your project dependencies using npm:

npm ls next

Analyze the terminal output to locate any version of Next in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.5.4), your application is affected.

Note: The npm ls next command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. In Next, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact - **Affected**: Users of Next.js between 9.5.0 and 9.5.3 - **Not affected**: Deployments on Vercel ([https://vercel.com](https://vercel.com)) are not affected - **Not affected**: Deployments using `next export` We recommend everyone to upgrade regardless of whether you can reproduce the issue or not. ### Patches https://github.com/vercel/next.js/releases/tag/v9.5.4 ### References https://github.com/vercel/next.js/releases/tag/v9.5.4

CVE-2020-15242 Affected Next Versions

1 component(s)
Fixed Versions:
9.5.4
Product / Package Ecosystem Affected Versions Fixed Version
next
npm/next
npm
≥ 9.5.0
< 9.5.4
9.5.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vercel/next.js/security/advisories/GHSA-x56p-c8cg-q435
NVD — CVE-2020-15242 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15242
Next Source Repository REPOSITORY
https://github.com/vercel/next.js
Next Release RELEASE
https://github.com/zeit/next.js/releases/tag/v9.5.4

Frequently Asked Questions

What is CVE-2020-15242?
CVE-2020-15242 is a security vulnerability in Next involving Open Redirect in Next.js versions under CWE-601: URL Redirection to Untrusted Site ('Open Redirect').
Which Next versions are affected?
Affected versions include releases prior to 9.5.4 across affected packages: next.
What version fixes CVE-2020-15242?
Upgrading to 9.5.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is next affected?
Yes, next is affected in releases prior to 9.5.4. Upgrade your dependency to 9.5.4 or later.
What is the CVSS score of CVE-2020-15242?
CVE-2020-15242 has a CVSS v3.1 base score of 4.7 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.
What CWE is associated with CVE-2020-15242?
CVE-2020-15242 is classified under CWE-601: 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.).
How can I check npm dependencies for CVE-2020-15242?
Run the dependency tree command: 'npm ls next'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x56p-c8cg-q435",
  "modified" : "2021-10-06T21:27:19Z",
  "published" : "2020-10-08T19:28:07Z",
  "aliases" : [ "CVE-2020-15242" ],
  "summary" : "Open Redirect in Next.js versions",
  "details" : "### Impact\n\n- **Affected**: Users of Next.js between 9.5.0 and 9.5.3 \n- **Not affected**: Deployments on Vercel ([https://vercel.com](https://vercel.com)) are not affected\n- **Not affected**: Deployments using `next export`\n\nWe recommend everyone to upgrade regardless of whether you can reproduce the issue or not.\n\n### Patches\n\nhttps://github.com/vercel/next.js/releases/tag/v9.5.4\n\n### References\n\nhttps://github.com/vercel/next.js/releases/tag/v9.5.4\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "next"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.5.0"
      }, {
        "fixed" : "9.5.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/security/advisories/GHSA-x56p-c8cg-q435"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15242"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vercel/next.js"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zeit/next.js/releases/tag/v9.5.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-10-08T19:27:38Z",
    "nvd_published_at" : null
  }
}