CVE-2018-20302: Xain Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-5chx-gg25-v37m
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2018-20302 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Xain libraries in the Hex ecosystem. The issue involves cross-site scripting in xain. Remediation is available by upgrading affected packages to version 0.6.2.

CVE-2018-20302 at a Glance

CVE Identifier CVE-2018-20302
GHSA Identifier GHSA-5chx-gg25-v37m
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 Xain
Package Ecosystem Hex
Published Date
Last Updated

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:N/UI:R/S:C/C:L/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 Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2018-20302

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

xain fixed: 0.6.2 
Upgrade xain to 0.6.2
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 xain

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-20302, inspect your project dependencies for Xain:

inspect dependencies for xain

Analyze the terminal output to locate any version of Xain in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.6.2), 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 Xain, 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

XSS is possible via the use of the order query parameter. An example request would look like: ``` http://host/ressources?order=%27><script>alert(1);</script> ```

CVE-2018-20302 Affected Xain Versions

1 component(s)
Fixed Versions:
0.6.2
Product / Package Ecosystem Affected Versions Fixed Version
xain
 Hex
< 0.6.2
0.6.2

References

NVD — CVE-2018-20302 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20302
Xain Source Repository REPOSITORY
https://github.com/smpallen99/xain/issues/18
Xain Source Repository REPOSITORY
https://github.com/dependabot/elixir-security-advisories/blob/master/packages/xain/2018-09-03.yml
Xain Source Repository REPOSITORY
https://github.com/smpallen99/xain

Frequently Asked Questions

What is CVE-2018-20302?
CVE-2018-20302 is a security vulnerability in Xain involving Cross-site Scripting in xain under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Xain versions are affected?
Affected versions include releases prior to 0.6.2 across affected packages: xain.
What version fixes CVE-2018-20302?
Upgrading to 0.6.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is xain affected?
Yes, xain is affected in releases prior to 0.6.2. Upgrade your dependency to 0.6.2 or later.
What is the CVSS score of CVE-2018-20302?
CVE-2018-20302 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-20302?
CVE-2018-20302 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 Hex dependencies for CVE-2018-20302?
Run the dependency tree command: 'inspect dependencies for xain'. 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-5chx-gg25-v37m",
  "modified" : "2022-04-12T21:17:38Z",
  "published" : "2022-04-12T21:17:38Z",
  "aliases" : [ "CVE-2018-20302" ],
  "summary" : "Cross-site Scripting in xain",
  "details" : "XSS is possible via the use of the order query parameter. An example request\n  would look like:\n  ```\n  http://host/ressources?order=%27><script>alert(1);</script>\n  ```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Hex",
      "name" : "xain"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.6.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-20302"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/smpallen99/xain/issues/18"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dependabot/elixir-security-advisories/blob/master/packages/xain/2018-09-03.yml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/smpallen99/xain"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-12T21:17:38Z",
    "nvd_published_at" : null
  }
}