CVE-2025-45143: String math Denial of Service Vulnerability

LOW
Advisory Identifier: GHSA-994j-5c83-r424
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CVSS 3.7
CWE-1333
Published
Advisory Summary

CVE-2025-45143 is a LOW (CVSS 3.7) denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting String math libraries in the npm ecosystem. The issue involves string-math's string-math.js vulnerability can cause regex denial of service (redos). Remediation is available in the latest vendor maintenance releases.

CVE-2025-45143 at a Glance

CVE Identifier CVE-2025-45143
GHSA Identifier GHSA-994j-5c83-r424
Severity LOW
CVSS v3.1 Base Score 3.7
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product String math
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 3.7

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

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

How to Fix CVE-2025-45143

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

string-math fixed: Latest secure release 
npm install string-math@Latest secure release
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 string-math

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2025-45143, inspect your project dependencies using npm:

npm ls string-math

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

Note: The npm ls string-math 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-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In String math, 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

string-math v1.2.2 was discovered to contain a Regex Denial of Service (ReDoS) which is exploited via a crafted input.

CVE-2025-45143 Affected String math Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
string-math
npm/string-math
npm
≤ 1.2.2

References

NVD — CVE-2025-45143 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-45143
String math Source Repository REPOSITORY
https://gist.github.com/6en6ar/361608bccedb808061359481fe2f1b39
String math Source Repository REPOSITORY
https://github.com/devrafalko/string-math
String math Source Repository REPOSITORY
https://github.com/devrafalko/string-math/blob/master/string-math.js
www.npmjs.com/package/string-math... WEB
https://www.npmjs.com/package/string-math%2C

Frequently Asked Questions

What is CVE-2025-45143?
CVE-2025-45143 is a security vulnerability in String math involving string-math's string-math.js vulnerability can cause Regex Denial of Service (ReDoS) under CWE-1333: Inefficient Regular Expression Complexity.
Which String math versions are affected?
Affected versions include releases prior to current release patches across affected packages: string-math.
What version fixes CVE-2025-45143?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is string-math affected?
Yes, string-math is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-45143?
CVE-2025-45143 has a CVSS v3.1 base score of 3.7 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2025-45143?
CVE-2025-45143 is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check npm dependencies for CVE-2025-45143?
Run the dependency tree command: 'npm ls string-math'. 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-994j-5c83-r424",
  "modified" : "2025-06-30T21:39:23Z",
  "published" : "2025-06-30T18:31:50Z",
  "aliases" : [ "CVE-2025-45143" ],
  "summary" : "string-math's string-math.js vulnerability can cause Regex Denial of Service (ReDoS) ",
  "details" : "string-math v1.2.2 was discovered to contain a Regex Denial of Service (ReDoS) which is exploited via a crafted input.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "string-math"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-45143"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/6en6ar/361608bccedb808061359481fe2f1b39"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/devrafalko/string-math"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/devrafalko/string-math/blob/master/string-math.js"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/package/string-math%2C"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-30T21:39:23Z",
    "nvd_published_at" : "2025-06-30T17:15:32Z"
  }
}