CVE-2017-15878: Keystone Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-7qcx-jmrc-h2rr
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2017-15878 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Keystone libraries in the npm ecosystem. The issue involves cross-site scripting in keystone. Remediation is available by upgrading affected packages to version 4.0.0.

CVE-2017-15878 at a Glance

CVE Identifier CVE-2017-15878
GHSA Identifier GHSA-7qcx-jmrc-h2rr
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 Keystone
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-2017-15878

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

keystone fixed: 4.0.0 
npm install keystone@4.0.0
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 keystone

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2017-15878, inspect your project dependencies using npm:

npm ls keystone

Analyze the terminal output to locate any version of Keystone in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0.0), your application is affected.

Note: The npm ls keystone 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 Keystone, 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

Versions of `keystone` prior to 4.0.0 are vulnerable to Cross-Site Scripting (XSS). The package fails to sanitize user input on the `Contact Us` page, allowing attackers to submit contact forms with malicious JavaScript in the message field. The output is not properly encoded leading an admin that opens new inquiry to execute the arbitrary JavaScript supplied in their browser. ## Recommendation Update to version 4.0.0 or later.

CVE-2017-15878 Affected Keystone Versions

1 component(s)
Fixed Versions:
4.0.0
Product / Package Ecosystem Affected Versions Fixed Version
keystone
npm/keystone
npm
< 4.0.0
4.0.0

References

NVD — CVE-2017-15878 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-15878
Keystone Source Repository REPOSITORY
https://github.com/keystonejs/keystone/pull/4478
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-7qcx-jmrc-h2rr
Keystone Source Repository REPOSITORY
https://github.com/keystonejs/keystone
Keystone Security Information SECURITY
https://packetstormsecurity.com/files/144756/KeystoneJS-4.0.0-beta.5-Unauthenticated-Stored-Cross-Site-Scripting.html
securelayer7.net/download/pdf/keysto... WEB
https://securelayer7.net/download/pdf/KeystoneJS-Pentest-Report-SecureLayer7.pdf
www.exploit-db.com/exploits/43054 WEB
https://www.exploit-db.com/exploits/43054
www.npmjs.com/advisories/980 WEB
https://www.npmjs.com/advisories/980
blog.securelayer7.net/keystonejs-open-sou... WEB
http://blog.securelayer7.net/keystonejs-open-source-penetration-testing-report
Keystone Security Information SECURITY
http://www.securityfocus.com/bid/101541

Frequently Asked Questions

What is CVE-2017-15878?
CVE-2017-15878 is a security vulnerability in Keystone involving Cross-Site Scripting in keystone under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Keystone versions are affected?
Affected versions include releases prior to 4.0.0 across affected packages: keystone.
What version fixes CVE-2017-15878?
Upgrading to 4.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keystone affected?
Yes, keystone is affected in releases prior to 4.0.0. Upgrade your dependency to 4.0.0 or later.
What is the CVSS score of CVE-2017-15878?
CVE-2017-15878 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-2017-15878?
CVE-2017-15878 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-2017-15878?
Run the dependency tree command: 'npm ls keystone'. 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-7qcx-jmrc-h2rr",
  "modified" : "2021-09-03T21:41:16Z",
  "published" : "2017-11-15T19:44:16Z",
  "aliases" : [ "CVE-2017-15878" ],
  "summary" : "Cross-Site Scripting in keystone",
  "details" : "Versions of `keystone` prior to 4.0.0 are vulnerable to Cross-Site Scripting (XSS). The package fails to sanitize user input on the `Contact Us` page,  allowing attackers to submit contact forms with malicious JavaScript in the message field. The output is not properly encoded leading an admin that opens new inquiry to execute the arbitrary JavaScript supplied in their browser.\n\n\n## Recommendation\n\nUpdate to version 4.0.0 or later.",
  "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" : "keystone"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-15878"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keystonejs/keystone/pull/4478"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-7qcx-jmrc-h2rr"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keystonejs/keystone"
  }, {
    "type" : "WEB",
    "url" : "https://packetstormsecurity.com/files/144756/KeystoneJS-4.0.0-beta.5-Unauthenticated-Stored-Cross-Site-Scripting.html"
  }, {
    "type" : "WEB",
    "url" : "https://securelayer7.net/download/pdf/KeystoneJS-Pentest-Report-SecureLayer7.pdf"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/43054"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/980"
  }, {
    "type" : "WEB",
    "url" : "http://blog.securelayer7.net/keystonejs-open-source-penetration-testing-report"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/101541"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:23:19Z",
    "nvd_published_at" : null
  }
}