Vulnerabilities in pkg:npm/matrix-js-sdk

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xvg8-m4x3-w6xr",
  "modified" : "2025-11-04T16:53:54Z",
  "published" : "2024-11-12T19:54:38Z",
  "aliases" : [ "CVE-2024-50336" ],
  "summary" : "matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal",
  "details" : "### Summary\n\nmatrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbitrary authenticated GET requests to the client's homeserver.\n\n### Details\n\nThe Matrix specification demands homeservers to [perform validation](https://spec.matrix.org/v1.12/client-server-api/#security-considerations-5) of the `server-name` and `media-id` components of MXC URIs with the intent to prevent path traversal. However, it is not mentioned that a similar check must also be performed on the client to prevent *client-side* path traversal. matrix-js-sdk fails to perform this validation.\n\n### Patches\n\nFixed in matrix-js-sdk 34.11.1.\n\n### Workarounds\n\nNone.\n\n### References\n\n- https://spec.matrix.org/v1.12/client-server-api/#security-considerations-5\n- https://blog.doyensec.com/2024/07/02/cspt2csrf.html",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "matrix-js-sdk"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "34.11.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-xvg8-m4x3-w6xr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-50336"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/matrix-org/matrix-js-sdk"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html"
  }, {
    "type" : "WEB",
    "url" : "https://spec.matrix.org/v1.12/client-server-api/#security-considerations-5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-11-12T19:54:38Z",
    "nvd_published_at" : "2024-11-12T17:15:09Z"
  }
}