{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.18.4"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/k1LoW/mo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.18.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-18T20:17:12Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Summary\n\nWhen rendering Markdown files containing inline SVG elements with `\u003cscript\u003e` tags, the embedded JavaScript is executed in the browser. This is due to `rehype-raw` passing raw HTML (including SVG) through to the DOM without sanitization.\n\n### PoC\n\n```html\n\u003csvg\u003e\u003cscript\u003ealert(1)\u003c/script\u003e\u003c/svg\u003e\n```\n\nEmbedding the above in a Markdown file opened with mo causes the script to execute.\n\n### Impact\n\nArbitrary JavaScript execution in the context of the mo application when a user opens a malicious Markdown file. This could lead to data exfiltration of other opened Markdown file contents.\n\n### Remediation\n\nFixed by adding `rehype-sanitize` to the Markdown rendering pipeline, which strips dangerous elements such as `\u003cscript\u003e` while preserving safe HTML.",
  "id": "GHSA-vccx-p757-pv6h",
  "modified": "2026-03-18T20:17:12Z",
  "published": "2026-03-18T20:17:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/k1LoW/mo/security/advisories/GHSA-vccx-p757-pv6h"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/k1LoW/mo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "mo has a XSS via inline SVG script tags in Markdown rendering"
}