GHSA-R8HM-W5F7-WJ39

Vulnerability from github – Published: 2021-11-02 15:42 – Updated: 2024-01-03 22:33
VLAI?
Summary
Cross-site scripting vulnerability in TinyMCE plugins
Details

Impact

A cross-site scripting (XSS) vulnerability was discovered in the URL processing logic of the image and link plugins. The vulnerability allowed arbitrary JavaScript execution when updating an image or link using a specially crafted URL. This issue only impacted users while editing and the dangerous URLs were stripped in any content extracted from the editor. This impacts all users who are using TinyMCE 5.9.2 or lower.

Patches

This vulnerability has been patched in TinyMCE 5.10.0 by improved sanitization logic when updating URLs in the relevant plugins.

Workarounds

To work around this vulnerability, either: - Upgrade to TinyMCE 5.10.0 or higher - Disable the image and link plugins

Acknowledgements

Tiny Technologies would like to thank Yakir6 for discovering this vulnerability.

References

https://www.tiny.cloud/docs/release-notes/release-notes510/#securityfixes

For more information

If you have any questions or comments about this advisory: * Email us at infosec@tiny.cloud * Open an issue in the TinyMCE repo

Severity ?
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tinymce/tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "TinyMCE"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "django-tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-21910"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-64",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-11-01T20:02:43Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the URL processing logic of the `image` and `link` plugins. The vulnerability allowed arbitrary JavaScript execution when updating an image or link using a specially crafted URL. This issue only impacted users while editing and the dangerous URLs were stripped in any content extracted from the editor. This impacts all users who are using TinyMCE 5.9.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.10.0 by improved sanitization logic when updating URLs in the relevant plugins.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.10.0 or higher\n- Disable the `image` and `link` plugins\n\n### Acknowledgements\nTiny Technologies would like to thank Yakir6 for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes510/#securityfixes\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [infosec@tiny.cloud](mailto:infosec@tiny.cloud)\n* Open an issue in the [TinyMCE repo](https://github.com/tinymce/tinymce/issues)",
  "id": "GHSA-r8hm-w5f7-wj39",
  "modified": "2024-01-03T22:33:13Z",
  "published": "2021-11-02T15:42:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-r8hm-w5f7-wj39"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jazzband/django-tinymce/issues/366"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jazzband/django-tinymce/releases/tag/3.4.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tinymce/tinymce"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/django-tinymce/3.4.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cross-site scripting vulnerability in TinyMCE plugins"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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