CVE-2023-26140: @excalidraw/excalidraw Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-v7v8-gjv7-ffmr
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2023-26140 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting @excalidraw/excalidraw libraries in the npm ecosystem. The issue involves @excalidraw/excalidraw cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 0.15.3.

CVE-2023-26140 at a Glance

CVE Identifier CVE-2023-26140
GHSA Identifier GHSA-v7v8-gjv7-ffmr
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 @excalidraw/excalidraw
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:3.1/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-2023-26140

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

@excalidraw/excalidraw fixed: 0.15.3 
npm install @excalidraw/excalidraw@0.15.3
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 @excalidraw/excalidraw

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-26140, inspect your project dependencies using npm:

npm ls @excalidraw/excalidraw

Analyze the terminal output to locate any version of @excalidraw/excalidraw in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.15.3), your application is affected.

Note: The npm ls @excalidraw/excalidraw 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 @excalidraw/excalidraw, 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

### Impact XSS vulnerability due to improperly sanitizing URLs of links that can be attached on canvas elements. This affects users of the npm package `@excalidraw/excalidraw` provided it was deployed in environments where untrusted user input in drawings that are then shared with third parties is a concern. If you only hosted the editor in trusted environments, or sharing didn't take place, the impact is minimized. ### Patches Patch is available on version 0.15.3 and up (stable), or latest `@excalidraw/excalidraw@next` (unstable releases). ### Workarounds No workaround without upgrading unless deployed in environments without untrusted user input. ### References https://security.snyk.io/vuln/SNYK-JS-EXCALIDRAWEXCALIDRAW-5841658 https://github.com/excalidraw/excalidraw/pull/6728

CVE-2023-26140 Affected @excalidraw/excalidraw Versions

1 component(s)
Fixed Versions:
0.15.3
Product / Package Ecosystem Affected Versions Fixed Version
@excalidraw/excalidraw
npm/@excalidraw/excalidraw
npm
< 0.15.3
0.15.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/excalidraw/excalidraw/security/advisories/GHSA-v7v8-gjv7-ffmr
NVD — CVE-2023-26140 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-26140
@excalidraw/excalidraw Source Repository REPOSITORY
https://github.com/excalidraw/excalidraw/pull/6728
Security Fix Commit FIX COMMIT
https://github.com/excalidraw/excalidraw/commit/b33fa6d6f64d27adc3a47b25c0aa55711740d0af
@excalidraw/excalidraw Source Repository REPOSITORY
https://github.com/excalidraw/excalidraw
@excalidraw/excalidraw Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-EXCALIDRAWEXCALIDRAW-5841658

Frequently Asked Questions

What is CVE-2023-26140?
CVE-2023-26140 is a security vulnerability in @excalidraw/excalidraw involving @excalidraw/excalidraw Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which @excalidraw/excalidraw versions are affected?
Affected versions include releases prior to 0.15.3 across affected packages: @excalidraw/excalidraw.
What version fixes CVE-2023-26140?
Upgrading to 0.15.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @excalidraw/excalidraw affected?
Yes, @excalidraw/excalidraw is affected in releases prior to 0.15.3. Upgrade your dependency to 0.15.3 or later.
What is the CVSS score of CVE-2023-26140?
CVE-2023-26140 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2023-26140?
CVE-2023-26140 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-2023-26140?
Run the dependency tree command: 'npm ls @excalidraw/excalidraw'. 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-v7v8-gjv7-ffmr",
  "modified" : "2023-08-16T21:00:33Z",
  "published" : "2023-08-16T21:00:33Z",
  "aliases" : [ "CVE-2023-26140" ],
  "summary" : "@excalidraw/excalidraw Cross-site Scripting vulnerability",
  "details" : "### Impact\n\nXSS vulnerability due to improperly sanitizing URLs of links that can be attached on canvas elements. This affects users of the npm package `@excalidraw/excalidraw` provided it was deployed in environments where untrusted user input in drawings that are then shared with third parties is a concern. If you only hosted the editor in trusted environments, or sharing didn't take place, the impact is minimized.\n\n### Patches\n\nPatch is available on version 0.15.3 and up (stable), or latest `@excalidraw/excalidraw@next` (unstable releases).\n\n### Workarounds\n\nNo workaround without upgrading unless deployed in environments without untrusted user input.\n\n### References\n\nhttps://security.snyk.io/vuln/SNYK-JS-EXCALIDRAWEXCALIDRAW-5841658\nhttps://github.com/excalidraw/excalidraw/pull/6728",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@excalidraw/excalidraw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.15.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/excalidraw/excalidraw/security/advisories/GHSA-v7v8-gjv7-ffmr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-26140"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/excalidraw/excalidraw/pull/6728"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/excalidraw/excalidraw/commit/b33fa6d6f64d27adc3a47b25c0aa55711740d0af"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/excalidraw/excalidraw"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-EXCALIDRAWEXCALIDRAW-5841658"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-16T21:00:33Z",
    "nvd_published_at" : null
  }
}