CVE-2018-20682: Forkcms/forkcms Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-xcmj-xjhg-wvhq
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2018-20682 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Forkcms/forkcms libraries in the Packagist ecosystem. The issue involves fork cms xss vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2018-20682 at a Glance

CVE Identifier CVE-2018-20682
GHSA Identifier GHSA-xcmj-xjhg-wvhq
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Forkcms/forkcms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.4

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2018-20682

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

forkcms/forkcms fixed: Latest secure release 
Upgrade forkcms/forkcms 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 forkcms/forkcms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-20682, inspect your project dependencies for Forkcms/forkcms:

inspect dependencies for forkcms/forkcms

Analyze the terminal output to locate any version of Forkcms/forkcms 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 Forkcms/forkcms, 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

Fork CMS 5.0.6 allows stored XSS via the `private/en/settings` `facebook_admin_ids` parameter (aka "Admin ids" input in the Facebook section).

CVE-2018-20682 Affected Forkcms/forkcms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
forkcms/forkcms
 Packagist
≤ 5.0.6

References

NVD — CVE-2018-20682 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20682
Forkcms/forkcms Source Repository REPOSITORY
https://github.com/forkcms/forkcms
www.netsparker.com/web-applications-ad... WEB
https://www.netsparker.com/web-applications-advisories/ns-18-032-stored-cross-site-scripting-in-forkcms

Frequently Asked Questions

What is CVE-2018-20682?
CVE-2018-20682 is a security vulnerability in Forkcms/forkcms involving Fork CMS XSS Vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Forkcms/forkcms versions are affected?
Affected versions include releases prior to current release patches across affected packages: forkcms/forkcms.
What version fixes CVE-2018-20682?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is forkcms/forkcms affected?
Yes, forkcms/forkcms 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-2018-20682?
CVE-2018-20682 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-20682?
CVE-2018-20682 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-2018-20682?
Run the dependency tree command: 'inspect dependencies for forkcms/forkcms'. 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-xcmj-xjhg-wvhq",
  "modified" : "2023-10-06T15:49:13Z",
  "published" : "2022-05-14T01:39:21Z",
  "aliases" : [ "CVE-2018-20682" ],
  "summary" : "Fork CMS XSS Vulnerability",
  "details" : "Fork CMS 5.0.6 allows stored XSS via the `private/en/settings` `facebook_admin_ids` parameter (aka \"Admin ids\" input in the Facebook section).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "forkcms/forkcms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.0.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-20682"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/forkcms/forkcms"
  }, {
    "type" : "WEB",
    "url" : "https://www.netsparker.com/web-applications-advisories/ns-18-032-stored-cross-site-scripting-in-forkcms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-25T18:17:48Z",
    "nvd_published_at" : "2019-01-09T23:29:00Z"
  }
}