GHSA-QWJ6-Q94F-8425

Vulnerability from github – Published: 2025-01-21 21:17 – Updated: 2025-04-02 00:33
VLAI
Summary
MathLive's Lack of Escaping of HTML allows for XSS
Details

Summary

Despite normal text rendering as LaTeX expressions, preventing XSS, the library also provides users with commands which may modify HTML, such as the \htmlData command, and the lack of escaping leads to XSS.

Details

Overall in the code, other than in the test folder, no functions escaping HTML can be seen.

PoC

  1. Go to https://cortexjs.io/mathlive/demo/
  2. Paste either \htmlData{><img/onerror=alert(1)"src=}{} or \htmlData{x=" ><img/onerror=alert(1) src>}{} in the LaTeX textarea.

Impact

MathLive users who render untrusted mathematical expressions could encounter malicious input using \htmlData that runs arbitrary JavaScript, or generate invalid HTML.

Severity
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.103.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "mathlive"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.104.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-29049"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-01-21T21:17:52Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\nDespite normal text rendering as LaTeX expressions, preventing XSS, the library also provides users with commands which may modify HTML, such as the `\\htmlData` command, and the lack of escaping leads to XSS.\n\n### Details\nOverall in the code, other than in the `test` folder, no functions escaping HTML can be seen.\n\n### PoC\n1. Go to https://cortexjs.io/mathlive/demo/\n2. Paste either `\\htmlData{\u003e\u003cimg/onerror=alert(1)\"src=}{}` or `\\htmlData{x=\" \u003e\u003cimg/onerror=alert(1) src\u003e}{}` in the LaTeX textarea.\n\n### Impact\nMathLive users who render untrusted mathematical expressions could encounter malicious input using \\htmlData that runs arbitrary JavaScript, or generate invalid HTML.",
  "id": "GHSA-qwj6-q94f-8425",
  "modified": "2025-04-02T00:33:42Z",
  "published": "2025-01-21T21:17:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/arnog/mathlive/security/advisories/GHSA-qwj6-q94f-8425"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-29049"
    },
    {
      "type": "WEB",
      "url": "https://github.com/arnog/mathlive/commit/abc26056fd5e29a99edfa96a0bbe855ea2a8b678"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/arnog/mathlive"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "MathLive\u0027s Lack of Escaping of HTML allows for XSS"
}


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