CVE-2024-29881: Tinymce/tinymce Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5359-pvf2-pw78",
  "modified" : "2024-03-26T21:23:45Z",
  "published" : "2024-03-26T21:23:45Z",
  "aliases" : [ "CVE-2024-29881" ],
  "summary" : "TinyMCE Cross-Site Scripting (XSS) vulnerability in handling external SVG files through Object or Embed elements",
  "details" : "### Impact\nA [cross-site scripting (XSS)](https://owasp.org/www-community/attacks/xss/) vulnerability was discovered in TinyMCE’s content loading and content inserting code. A SVG image could be loaded though an `object` or `embed` element and that image could potentially contain a XSS payload.\n\n### Fix\nTinyMCE 6.8.1 introduced a new `convert_unsafe_embeds` option to automatically convert `object` and `embed` elements respective of their `type` attribute.  From TinyMCE 7.0.0 onwards, the `convert_unsafe_embeds` option is enabled by default.\n\n### Workarounds\nIf you are using TinyMCE 6.8.1 or higher, set `convert_unsafe_embeds` to true. For any earlier versions, a custom NodeFilter is recommended to remove or modify any `object` or `embed` elements. This can be added using the `editor.parser.addNodeFilter` and `editor.serializer.addNodeFilter` APIs.\n\n### Acknowledgements\nTiny Technologies would like to thank Toni Huttunen of [Fraktal Oy](https://www.fraktal.fi/) for discovering this vulnerability.\n\n### References\n- [TinyMCE 6.8.1](https://www.tiny.cloud/docs/tinymce/6/6.8.1-release-notes/#new-convert_unsafe_embeds-option-that-controls-whether-object-and-embed-elements-will-be-converted-to-more-restrictive-alternatives-namely-img-for-image-mime-types-video-for-video-mime-types-audio-audio-mime-types-or-iframe-for-other-or-unspecified-mime-types)\n- [TinyMCE 7.0.0](https://www.tiny.cloud/docs/tinymce/7/7.0-release-notes/#convert_unsafe_embeds-editor-option-is-now-defaulted-to-true)\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "tinymce/tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "7.0.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "tinymce"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "7.0.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "TinyMCE"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "7.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/tinymce/tinymce/security/advisories/GHSA-5359-pvf2-pw78"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-29881"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tinymce/tinymce/commit/bcdea2ad14e3c2cea40743fb48c63bba067ae6d1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tinymce/tinymce"
  }, {
    "type" : "WEB",
    "url" : "https://www.tiny.cloud/docs/tinymce/6/6.8.1-release-notes/#new-convert_unsafe_embeds-option-that-controls-whether-object-and-embed-elements-will-be-converted-to-more-restrictive-alternatives-namely-img-for-image-mime-types-video-for-video-mime-types-audio-audio-mime-types-or-iframe-for-other-or-unspecified-mime-types"
  }, {
    "type" : "WEB",
    "url" : "https://www.tiny.cloud/docs/tinymce/7/7.0-release-notes/#convert_unsafe_embeds-editor-option-is-now-defaulted-to-true"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-26T21:23:45Z",
    "nvd_published_at" : "2024-03-26T14:15:09Z"
  }
}