Vulnerabilities in pkg:npm/ckeditor

PACKAGE
Advisory Identifier: GHSA-g68x-vvqq-pvw3
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Advisory Summary

CVE-2018-17960 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Ckeditor libraries in the npm ecosystem. The issue involves ckeditor xss vulnerability. Remediation is available by upgrading affected packages to version 4.11.0, 8.7.21, 9.5.2.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/ckeditor

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/ckeditor. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-g68x-vvqq-pvw3 CVE-2018-17960 MODERATE Ckeditor XSS Vulnerability

CVE-2018-17960 at a Glance

CVE Identifier CVE-2018-17960
GHSA Identifier GHSA-g68x-vvqq-pvw3
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 Ckeditor
Package Ecosystem npm
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-2018-17960

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

ckeditor fixed: 4.11.0 
npm install ckeditor@4.11.0
typo3/cms-core fixed: 8.7.21 
Upgrade typo3/cms-core to 8.7.21
typo3/cms-core fixed: 9.5.2 
Upgrade typo3/cms-core to 9.5.2
typo3/cms fixed: 8.7.21 
Upgrade typo3/cms to 8.7.21
typo3/cms fixed: 9.5.2 
Upgrade typo3/cms to 9.5.2
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 ckeditor

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2018-17960, inspect your project dependencies using npm:

npm ls ckeditor

Analyze the terminal output to locate any version of Ckeditor in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.11.0), your application is affected.

Note: The npm ls ckeditor 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-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 Ckeditor, 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

CKEditor 4.x before 4.11.0 allows user-assisted XSS involving a source-mode paste. It was possible to execute XSS inside the CKEditor source area after persuading the victim to: (i) switch CKEditor to source mode, then (ii) paste a specially crafted HTML code, prepared by the attacker, into the opened CKEditor source area, and (iii) switch back to WYSIWYG mode. Although this is an unlikely scenario, it is recommended to upgrade to the latest editor version.

CVE-2018-17960 Affected Ckeditor Versions

5 component(s)
Fixed Versions:
4.11.08.7.219.5.2
Product / Package Ecosystem Affected Versions Fixed Version
ckeditor
npm/ckeditor
npm
< 4.11.0
4.11.0
typo3/cms-core
 Packagist
≥ 8.0.0
< 8.7.21
8.7.21
typo3/cms-core
 Packagist
≥ 9.0.0
< 9.5.2
9.5.2
typo3/cms
 Packagist
≥ 8.0.0
< 8.7.21
8.7.21
typo3/cms
 Packagist
≥ 9.0.0
< 9.5.2
9.5.2

References

NVD — CVE-2018-17960 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-17960
Ckeditor Release RELEASE
https://ckeditor.com/blog/CKEditor-4.11-with-emoji-dropdown-and-auto-link-on-typing-released
Ckeditor Release RELEASE
https://ckeditor.com/cke4/release/CKEditor-4.11.0
Ckeditor Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2018-17960.yaml
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-g68x-vvqq-pvw3
Ckeditor Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2018-17960.yaml
Ckeditor Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2018-005
Ckeditor Security Information SECURITY
https://web.archive.org/web/20200227030123/http://www.securityfocus.com/bid/109205
Ckeditor Security Information SECURITY
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

Frequently Asked Questions

What is CVE-2018-17960?
CVE-2018-17960 is a security vulnerability in Ckeditor involving Ckeditor XSS Vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Ckeditor versions are affected?
Affected versions include releases prior to 4.11.0, 8.7.21, 9.5.2 across affected packages: ckeditor, typo3/cms-core, typo3/cms.
What version fixes CVE-2018-17960?
Upgrading to 4.11.0, 8.7.21, 9.5.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ckeditor affected?
Yes, ckeditor is affected in releases prior to 4.11.0. Upgrade your dependency to 4.11.0 or later.
Is typo3/cms-core affected?
Yes, typo3/cms-core is affected in releases prior to 8.7.21, 9.5.2. Upgrade your dependency to 8.7.21, 9.5.2 or later.
What is the CVSS score of CVE-2018-17960?
CVE-2018-17960 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-2018-17960?
CVE-2018-17960 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 npm dependencies for CVE-2018-17960?
Run the dependency tree command: 'npm ls ckeditor'. 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-g68x-vvqq-pvw3",
  "modified" : "2023-09-08T21:34:45Z",
  "published" : "2018-11-21T22:19:50Z",
  "aliases" : [ "CVE-2018-17960" ],
  "summary" : "Ckeditor XSS Vulnerability",
  "details" : "CKEditor 4.x before 4.11.0 allows user-assisted XSS involving a source-mode paste. It was possible to execute XSS inside the CKEditor source area after persuading the victim to: (i) switch CKEditor to source mode, then (ii) paste a specially crafted HTML code, prepared by the attacker, into the opened CKEditor source area, and (iii) switch back to WYSIWYG mode. Although this is an unlikely scenario, it is recommended to upgrade to the latest editor version.",
  "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" : "npm",
      "name" : "ckeditor"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.11.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.7.21"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.7.21"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-17960"
  }, {
    "type" : "WEB",
    "url" : "https://ckeditor.com/blog/CKEditor-4.11-with-emoji-dropdown-and-auto-link-on-typing-released"
  }, {
    "type" : "WEB",
    "url" : "https://ckeditor.com/cke4/release/CKEditor-4.11.0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2018-17960.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2018-17960.yaml"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-g68x-vvqq-pvw3"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2018-005"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20200227030123/http://www.securityfocus.com/bid/109205"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:36:12Z",
    "nvd_published_at" : null
  }
}