CVE-2018-17876: Web feet/coastercms Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-77cq-wgpf-g449
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2018-17876 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Web feet/coastercms libraries in the Packagist ecosystem. The issue involves coaster cms stored cross-site scripting vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2018-17876 at a Glance

CVE Identifier CVE-2018-17876
GHSA Identifier GHSA-77cq-wgpf-g449
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 Web feet/coastercms
Package Ecosystem Packagist
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-2018-17876

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

web-feet/coastercms fixed: Latest secure release 
Upgrade web-feet/coastercms 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 web-feet/coastercms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-17876, inspect your project dependencies for Web feet/coastercms:

inspect dependencies for web-feet/coastercms

Analyze the terminal output to locate any version of Web feet/coastercms 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 Web feet/coastercms, 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

A Stored Cross-site Scripting vulnerability has been discovered in the v5.5.0 version of the Coaster CMS product.

CVE-2018-17876 Affected Web feet/coastercms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
web-feet/coastercms
 Packagist
5.5.0
All 1 versions
5.5.0
None specified

References

NVD — CVE-2018-17876 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-17876
Web feet/coastercms Source Repository REPOSITORY
https://github.com/CoasterCms/coastercms
Web feet/coastercms Security Information SECURITY
http://packetstormsecurity.com/files/149647/Coaster-CMS-5.5.0-Cross-Site-Scripting.html

Frequently Asked Questions

What is CVE-2018-17876?
CVE-2018-17876 is a security vulnerability in Web feet/coastercms involving Coaster CMS Stored Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Web feet/coastercms versions are affected?
Affected versions include releases prior to current release patches across affected packages: web-feet/coastercms.
What version fixes CVE-2018-17876?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is web-feet/coastercms affected?
Yes, web-feet/coastercms 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-2018-17876?
CVE-2018-17876 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-2018-17876?
CVE-2018-17876 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-2018-17876?
Run the dependency tree command: 'inspect dependencies for web-feet/coastercms'. 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-77cq-wgpf-g449",
  "modified" : "2024-04-23T22:57:39Z",
  "published" : "2022-05-14T01:58:19Z",
  "aliases" : [ "CVE-2018-17876" ],
  "summary" : "Coaster CMS Stored Cross-site Scripting vulnerability",
  "details" : "A Stored Cross-site Scripting vulnerability has been discovered in the v5.5.0 version of the Coaster CMS product.",
  "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" : "Packagist",
      "name" : "web-feet/coastercms"
    },
    "versions" : [ "5.5.0" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-17876"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/CoasterCms/coastercms"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/149647/Coaster-CMS-5.5.0-Cross-Site-Scripting.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T22:57:39Z",
    "nvd_published_at" : "2018-10-04T19:29:00Z"
  }
}