CVE-2024-38527: @zenuml/core Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-q6xv-jm4v-349h
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CVSS 5.4
CWE-80 CWE-79
Published
Advisory Summary

CVE-2024-38527 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)) affecting @zenuml/core libraries in the npm ecosystem. The issue involves cross-site scripting in zenuml. Remediation is available by upgrading affected packages to version 3.23.25.

CVE-2024-38527 at a Glance

CVE Identifier CVE-2024-38527
GHSA Identifier GHSA-q6xv-jm4v-349h
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Affected Product @zenuml/core
Package Ecosystem npm
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:H/PR:N/UI:N/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2024-38527

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

@zenuml/core fixed: 3.23.25 
npm install @zenuml/core@3.23.25
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 @zenuml/core

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2024-38527, inspect your project dependencies using npm:

npm ls @zenuml/core

Analyze the terminal output to locate any version of @zenuml/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.23.25), your application is affected.

Note: The npm ls @zenuml/core 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-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS), where the product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. In @zenuml/core, 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

### Summary Markdown-based comments in the ZenUML diagram syntax are susceptible to Cross-site Scripting (XSS). ### Details The comment feature allows the user to attach small notes for reference. This feature allows the user to enter in their comment in markdown comment, allowing them to use common markdown features, such as `**` for bolded text. However, the markdown text is currently not sanitized before rendering, allowing an attacker to enter a malicious payload for the comment which leads to XSS. https://github.com/mermaid-js/zenuml-core/blob/dcfee8cde42673c09e19401f43ad8506658c8442/src/components/DiagramFrame/SeqDiagram/MessageLayer/Block/Statement/Comment/Comment.vue#L65 ### PoC ``` // p<img onerror=alert(1) src=""/> A->B:hi ``` Above is a POC diagram payload that results in an XSS. Here is a similar POC in mermaid.live: https://mermaid.live/edit#pako:eNpNjrFuwyAQhl8F3dRK1DaQGhs1kVq1Y6duFQsylwTVgEWw1MTyuxc5S7df39399y0wRIug4IZh9qMOdU2mF-dPJAZMKaa9GTHlB_ZILmnYa9BQH3R4fTq8qbMDCh6TN86WhkUHQjTkM3rUoEq0Jv2Ui7CWPTPn-HUNA6icZqQwT9ZkfHfmlIwHdTTjpVC0Lsf0eVfazChMJoBa4BdUL6uGC8n7TrCGd5zCFRRnXbVjvBVNK3gJXbtSuMVYSlnFC-Kyf961UshWbmXf2-y_xcf29c7WP2yrVC0 ### Impact This puts existing applications that use ZenUML **unsandboxed** at risk of arbitrary JavaScript execution when rendering user-controlled diagrams.

CVE-2024-38527 Affected @zenuml/core Versions

1 component(s)
Fixed Versions:
3.23.25
Product / Package Ecosystem Affected Versions Fixed Version
@zenuml/core
npm/@zenuml/core
npm
< 3.23.25
3.23.25

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mermaid-js/zenuml-core/security/advisories/GHSA-q6xv-jm4v-349h
NVD — CVE-2024-38527 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-38527
Security Fix Commit FIX COMMIT
https://github.com/mermaid-js/zenuml-core/commit/ad7545b33f5f27466cbf357beb65969ca1953e3c
@zenuml/core Source Repository REPOSITORY
https://github.com/mermaid-js/zenuml-core

Frequently Asked Questions

What is CVE-2024-38527?
CVE-2024-38527 is a security vulnerability in @zenuml/core involving Cross-site Scripting in ZenUML under CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS).
Which @zenuml/core versions are affected?
Affected versions include releases prior to 3.23.25 across affected packages: @zenuml/core.
What version fixes CVE-2024-38527?
Upgrading to 3.23.25 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @zenuml/core affected?
Yes, @zenuml/core is affected in releases prior to 3.23.25. Upgrade your dependency to 3.23.25 or later.
What is the CVSS score of CVE-2024-38527?
CVE-2024-38527 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2024-38527?
CVE-2024-38527 is classified under CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) (The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.).
How can I check npm dependencies for CVE-2024-38527?
Run the dependency tree command: 'npm ls @zenuml/core'. 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-q6xv-jm4v-349h",
  "modified" : "2024-06-26T21:56:14Z",
  "published" : "2024-06-26T19:03:54Z",
  "aliases" : [ "CVE-2024-38527" ],
  "summary" : "Cross-site Scripting in ZenUML",
  "details" : "### Summary\n\nMarkdown-based comments in the ZenUML diagram syntax are susceptible to Cross-site Scripting (XSS).\n\n### Details\n\nThe comment feature allows the user to attach small notes for reference. This feature allows the user to enter in their comment in markdown comment, allowing them to use common markdown features, such as `**` for bolded text. However, the markdown text is currently not sanitized before rendering, allowing an attacker to enter a malicious payload for the comment which leads to XSS.\n\nhttps://github.com/mermaid-js/zenuml-core/blob/dcfee8cde42673c09e19401f43ad8506658c8442/src/components/DiagramFrame/SeqDiagram/MessageLayer/Block/Statement/Comment/Comment.vue#L65\n\n### PoC\n\n```\n// p<img onerror=alert(1) src=\"\"/>\nA->B:hi\n```\n\nAbove is a POC diagram payload that results in an XSS.\n\nHere is a similar POC in mermaid.live: https://mermaid.live/edit#pako:eNpNjrFuwyAQhl8F3dRK1DaQGhs1kVq1Y6duFQsylwTVgEWw1MTyuxc5S7df39399y0wRIug4IZh9qMOdU2mF-dPJAZMKaa9GTHlB_ZILmnYa9BQH3R4fTq8qbMDCh6TN86WhkUHQjTkM3rUoEq0Jv2Ui7CWPTPn-HUNA6icZqQwT9ZkfHfmlIwHdTTjpVC0Lsf0eVfazChMJoBa4BdUL6uGC8n7TrCGd5zCFRRnXbVjvBVNK3gJXbtSuMVYSlnFC-Kyf961UshWbmXf2-y_xcf29c7WP2yrVC0\n\n### Impact\n\nThis puts existing applications that use ZenUML **unsandboxed** at risk of arbitrary JavaScript execution when rendering user-controlled diagrams.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@zenuml/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.23.25"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mermaid-js/zenuml-core/security/advisories/GHSA-q6xv-jm4v-349h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-38527"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mermaid-js/zenuml-core/commit/ad7545b33f5f27466cbf357beb65969ca1953e3c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mermaid-js/zenuml-core"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79", "CWE-80" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-26T19:03:54Z",
    "nvd_published_at" : "2024-06-26T20:15:16Z"
  }
}