CVE-2018-14520: Getkirby/cms Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-h3w2-qg2r-c7mf
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2018-14520 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Getkirby/cms libraries in the Packagist ecosystem. The issue involves kirby cms 2.5.12 cross-site scripting. Remediation is available in the latest vendor maintenance releases.

CVE-2018-14520 at a Glance

CVE Identifier CVE-2018-14520
GHSA Identifier GHSA-h3w2-qg2r-c7mf
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 Getkirby/cms
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:3.1/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-2018-14520

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

getkirby/cms fixed: Latest secure release 
Upgrade getkirby/cms 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 getkirby/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-14520, inspect your project dependencies for Getkirby/cms:

inspect dependencies for getkirby/cms

Analyze the terminal output to locate any version of Getkirby/cms 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 Getkirby/cms, 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

An issue was discovered in Kirby 2.5.12. The application allows malicious HTTP requests to be sent in order to trick a user into adding web pages.

CVE-2018-14520 Affected Getkirby/cms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
getkirby/cms
 Packagist
≤ 2.5.12

References

NVD — CVE-2018-14520 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-14520
Getkirby/cms Source Repository REPOSITORY
https://github.com/getkirby/kirby
www.exploit-db.com/exploits/45068 WEB
https://www.exploit-db.com/exploits/45068
zaranshaikh.blogspot.com/2018/07/cross-site-... WEB
http://zaranshaikh.blogspot.com/2018/07/cross-site-request-forgery-kirby-cms.html

Frequently Asked Questions

What is CVE-2018-14520?
CVE-2018-14520 is a security vulnerability in Getkirby/cms involving Kirby CMS 2.5.12 Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Getkirby/cms versions are affected?
Affected versions include releases prior to current release patches across affected packages: getkirby/cms.
What version fixes CVE-2018-14520?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is getkirby/cms affected?
Yes, getkirby/cms 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-2018-14520?
CVE-2018-14520 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-14520?
CVE-2018-14520 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-2018-14520?
Run the dependency tree command: 'inspect dependencies for getkirby/cms'. 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-h3w2-qg2r-c7mf",
  "modified" : "2022-09-16T21:01:55Z",
  "published" : "2022-08-25T00:00:25Z",
  "aliases" : [ "CVE-2018-14520" ],
  "summary" : "Kirby CMS 2.5.12 Cross-site Scripting",
  "details" : "An issue was discovered in Kirby 2.5.12. The application allows malicious HTTP requests to be sent in order to trick a user into adding web pages.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "getkirby/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.5.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-14520"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/getkirby/kirby"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/45068"
  }, {
    "type" : "WEB",
    "url" : "http://zaranshaikh.blogspot.com/2018/07/cross-site-request-forgery-kirby-cms.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-09-16T21:01:55Z",
    "nvd_published_at" : "2022-08-24T20:15:00Z"
  }
}