CVE-2021-4050: Remdex/livehelperchat Cross Site Scripting Vulnerability

MODERATE

Advisory Identifier: GHSA-97cc-825c-399g

CVSS 6.1

Published 2021-12-10

Advisory Summary

CVE-2021-4050 is a MODERATE (CVSS 6.1) cross site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Remdex/livehelperchat libraries in the Packagist ecosystem. The issue involves cross site scripting in remdex/livehelperchat. Remediation is available in the latest vendor maintenance releases.

CVE-2021-4050 at a Glance

CVE Identifier CVE-2021-4050

GHSA Identifier GHSA-97cc-825c-399g

Severity MODERATE

CVSS v3.1 Base Score 6.1

CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Product Remdex/livehelperchat

Package Ecosystem Packagist

Published Date 2021-12-10

Last Updated 2021-12-09

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required High (PR:H)

User Interaction Required (UI:R)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability None (A:N)

How to Fix CVE-2021-4050

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

remdex/livehelperchat fixed: Latest secure release

Upgrade remdex/livehelperchat to 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:

inspect dependencies for remdex/livehelperchat

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-4050, inspect your project dependencies for Remdex/livehelperchat:

inspect dependencies for remdex/livehelperchat

Analyze the terminal output to locate any version of Remdex/livehelperchat 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: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Remdex/livehelperchat, 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

livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE-2021-4050 Affected Remdex/livehelperchat Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
remdex/livehelperchat	Packagist	≤ 2.0

References

NVD — CVE-2021-4050 NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-4050

Security Fix Commit FIX COMMIT

https://github.com/livehelperchat/livehelperchat/commit/0ce1dd2a13509747c240c8484228a5df8d6e03ec

huntr.dev/bounties/27eb39d7-7... WEB

https://huntr.dev/bounties/27eb39d7-7636-4c4b-922c-a2f8fbe1ba05

Frequently Asked Questions

What is CVE-2021-4050?

CVE-2021-4050 is a security vulnerability in Remdex/livehelperchat involving Cross site scripting in remdex/livehelperchat under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').

Which Remdex/livehelperchat versions are affected?

Affected versions include releases prior to current release patches across affected packages: remdex/livehelperchat.

What version fixes CVE-2021-4050?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is remdex/livehelperchat affected?

Yes, remdex/livehelperchat 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-2021-4050?

CVE-2021-4050 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N.

What CWE is associated with CVE-2021-4050?

CVE-2021-4050 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).

How can I check Packagist dependencies for CVE-2021-4050?

Run the dependency tree command: 'inspect dependencies for remdex/livehelperchat'. 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-97cc-825c-399g",
  "modified" : "2021-12-09T18:07:18Z",
  "published" : "2021-12-10T20:33:29Z",
  "aliases" : [ "CVE-2021-4050" ],
  "summary" : "Cross site scripting in remdex/livehelperchat",
  "details" : "livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "remdex/livehelperchat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-4050"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/livehelperchat/livehelperchat/commit/0ce1dd2a13509747c240c8484228a5df8d6e03ec"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/27eb39d7-7636-4c4b-922c-a2f8fbe1ba05"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-12-09T18:07:18Z",
    "nvd_published_at" : "2021-12-08T11:15:00Z"
  }
}

CVSS V3

6.1 MODERATE