CVE-2025-55173: Next Next.js Content Injection Vulnerability For Vulnerability

MODERATE
Advisory Identifier: GHSA-xv57-4mr9-wg8v
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CVSS 4.3
CWE-20
Published
Advisory Summary

CVE-2025-55173 is a MODERATE (CVSS 4.3) next.js content injection vulnerability for vulnerability (CWE-20: Improper Input Validation) affecting Next libraries in the npm ecosystem. The issue involves next.js content injection vulnerability for image optimization. Remediation is available by upgrading affected packages to version 14.2.31, 15.4.5.

CVE-2025-55173 at a Glance

CVE Identifier CVE-2025-55173
GHSA Identifier GHSA-xv57-4mr9-wg8v
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-20: Improper Input Validation
Affected Product Next
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:U/C:N/I:L/A:N).

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

How to Fix CVE-2025-55173

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: 14.2.31 
npm install next@14.2.31
next fixed: 15.4.5 
npm install next@15.4.5
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-2025-55173, 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 14.2.31), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. 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

A vulnerability in **Next.js Image Optimization** has been fixed in **v15.4.5** and **v14.2.31**. The issue allowed attacker-controlled external image sources to trigger file downloads with arbitrary content and filenames under specific configurations. This behavior could be abused for phishing or malicious file delivery. All users relying on `images.domains` or `images.remotePatterns` are encouraged to upgrade and verify that external image sources are strictly validated. More details at [Vercel Changelog](https://vercel.com/changelog/cve-2025-55173)

CVE-2025-55173 Affected Next Versions

2 component(s)
Fixed Versions:
14.2.3115.4.5
Product / Package Ecosystem Affected Versions Fixed Version
next
npm/next
npm
≥ 0.9.9
< 14.2.31
14.2.31
next
npm/next
npm
≥ 15.0.0
< 15.4.5
15.4.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vercel/next.js/security/advisories/GHSA-xv57-4mr9-wg8v
NVD — CVE-2025-55173 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55173
Security Fix Commit FIX COMMIT
https://github.com/vercel/next.js/commit/6b12c60c61ee80cb0443ccd20de82ca9b4422ddd
Next Source Repository REPOSITORY
https://github.com/vercel/next.js
vercel.com/changelog/cve-2025-... WEB
https://vercel.com/changelog/cve-2025-55173
vercel.com/changelog/cve-2025-... WEB
http://vercel.com/changelog/cve-2025-55173

Frequently Asked Questions

What is CVE-2025-55173?
CVE-2025-55173 is a security vulnerability in Next involving Next.js Content Injection Vulnerability for Image Optimization under CWE-20: Improper Input Validation.
Which Next versions are affected?
Affected versions include releases prior to 14.2.31, 15.4.5 across affected packages: next.
What version fixes CVE-2025-55173?
Upgrading to 14.2.31, 15.4.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is next affected?
Yes, next is affected in releases prior to 14.2.31, 15.4.5. Upgrade your dependency to 14.2.31, 15.4.5 or later.
What is the CVSS score of CVE-2025-55173?
CVE-2025-55173 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2025-55173?
CVE-2025-55173 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check npm dependencies for CVE-2025-55173?
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-xv57-4mr9-wg8v",
  "modified" : "2025-09-11T15:35:24Z",
  "published" : "2025-08-29T21:59:55Z",
  "aliases" : [ "CVE-2025-55173" ],
  "summary" : "Next.js Content Injection Vulnerability for Image Optimization",
  "details" : "A vulnerability in **Next.js Image Optimization** has been fixed in **v15.4.5** and **v14.2.31**. The issue allowed attacker-controlled external image sources to trigger file downloads with arbitrary content and filenames under specific configurations. This behavior could be abused for phishing or malicious file delivery.\n\nAll users relying on `images.domains` or `images.remotePatterns` are encouraged to upgrade and verify that external image sources are strictly validated.\n\nMore details at [Vercel Changelog](https://vercel.com/changelog/cve-2025-55173)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "next"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.9.9"
      }, {
        "fixed" : "14.2.31"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "next"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "15.0.0"
      }, {
        "fixed" : "15.4.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 15.4.4"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/security/advisories/GHSA-xv57-4mr9-wg8v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-55173"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/commit/6b12c60c61ee80cb0443ccd20de82ca9b4422ddd"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vercel/next.js"
  }, {
    "type" : "WEB",
    "url" : "https://vercel.com/changelog/cve-2025-55173"
  }, {
    "type" : "WEB",
    "url" : "http://vercel.com/changelog/cve-2025-55173"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-08-29T21:59:55Z",
    "nvd_published_at" : "2025-08-29T22:15:31Z"
  }
}