CVE-2022-25927: Ua parser js Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-fhg7-m89q-25r3
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CVSS 7.5
CWE-400 CWE-1333
Published
Advisory Summary

CVE-2022-25927 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Ua parser js libraries in the npm ecosystem. The issue involves redos vulnerability in ua-parser-js version. Remediation is available by upgrading affected packages to version 0.7.33, 1.0.33.

CVE-2022-25927 at a Glance

CVE Identifier CVE-2022-25927
GHSA Identifier GHSA-fhg7-m89q-25r3
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Ua parser js
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/S:U/C:N/I:N/A:H).

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

How to Fix CVE-2022-25927

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

ua-parser-js fixed: 0.7.33 
npm install ua-parser-js@0.7.33
ua-parser-js fixed: 1.0.33 
npm install ua-parser-js@1.0.33
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 ua-parser-js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-25927, inspect your project dependencies using npm:

npm ls ua-parser-js

Analyze the terminal output to locate any version of Ua parser js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.33), your application is affected.

Note: The npm ls ua-parser-js 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Ua parser js, 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

### Description: A regular expression denial of service (ReDoS) vulnerability has been discovered in `ua-parser-js`. ### Impact: This vulnerability bypass the library's `MAX_LENGTH` input limit prevention. By crafting a very-very-long user-agent string with specific pattern, an attacker can turn the script to get stuck processing for a very long time which results in a denial of service (DoS) condition. ### Affected Versions: From version `0.7.30` to before versions `0.7.33` / `1.0.33`. ### Patches: A patch has been released to remove the vulnerable regular expression, update to version `0.7.33` / `1.0.33` or later. ### References: [Regular expression Denial of Service - ReDoS](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS) ### Credits: Thanks to @Snyk who first reported the issue.

CVE-2022-25927 Affected Ua parser js Versions

2 component(s)
Fixed Versions:
0.7.331.0.33
Product / Package Ecosystem Affected Versions Fixed Version
ua-parser-js
npm/ua-parser-js
npm
≥ 0.7.30
< 0.7.33
0.7.33
ua-parser-js
npm/ua-parser-js
npm
≥ 0.8.0
< 1.0.33
1.0.33

References

GitHub Advisory / Wiki ADVISORY
https://github.com/faisalman/ua-parser-js/security/advisories/GHSA-fhg7-m89q-25r3
NVD — CVE-2022-25927 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-25927
Security Fix Commit FIX COMMIT
https://github.com/faisalman/ua-parser-js/commit/a6140a17dd0300a35cfc9cff999545f267889411
Ua parser js Source Repository REPOSITORY
https://github.com/faisalman/ua-parser-js
Ua parser js Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-UAPARSERJS-3244450

Frequently Asked Questions

What is CVE-2022-25927?
CVE-2022-25927 is a security vulnerability in Ua parser js involving ReDoS Vulnerability in ua-parser-js version under CWE-400: Uncontrolled Resource Consumption.
Which Ua parser js versions are affected?
Affected versions include releases prior to 0.7.33, 1.0.33 across affected packages: ua-parser-js.
What version fixes CVE-2022-25927?
Upgrading to 0.7.33, 1.0.33 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ua-parser-js affected?
Yes, ua-parser-js is affected in releases prior to 0.7.33, 1.0.33. Upgrade your dependency to 0.7.33, 1.0.33 or later.
What is the CVSS score of CVE-2022-25927?
CVE-2022-25927 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2022-25927?
CVE-2022-25927 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2022-25927?
Run the dependency tree command: 'npm ls ua-parser-js'. 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-fhg7-m89q-25r3",
  "modified" : "2025-10-17T16:52:22Z",
  "published" : "2023-01-24T15:36:32Z",
  "aliases" : [ "CVE-2022-25927" ],
  "summary" : "ReDoS Vulnerability in ua-parser-js version",
  "details" : "### Description:\nA regular expression denial of service (ReDoS) vulnerability has been discovered in `ua-parser-js`.\n\n### Impact:\nThis vulnerability bypass the library's `MAX_LENGTH` input limit prevention. By crafting a very-very-long user-agent string with specific pattern, an attacker can turn the script to get stuck processing for a very long time which results in a denial of service (DoS) condition.\n\n### Affected Versions:\nFrom version `0.7.30` to before versions `0.7.33` / `1.0.33`.\n\n### Patches:\nA patch has been released to remove the vulnerable regular expression, update to version `0.7.33` / `1.0.33` or later.\n\n### References:\n[Regular expression Denial of Service - ReDoS](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS)\n\n### Credits:\nThanks to @Snyk who first reported the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ua-parser-js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.7.30"
      }, {
        "fixed" : "0.7.33"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ua-parser-js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.8.0"
      }, {
        "fixed" : "1.0.33"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/faisalman/ua-parser-js/security/advisories/GHSA-fhg7-m89q-25r3"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-25927"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/faisalman/ua-parser-js/commit/a6140a17dd0300a35cfc9cff999545f267889411"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/faisalman/ua-parser-js"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-UAPARSERJS-3244450"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333", "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-01-24T15:36:32Z",
    "nvd_published_at" : "2023-01-26T21:15:00Z"
  }
}