GHSA-GG8R-XJWQ-4W92

Vulnerability from github – Published: 2022-12-08 23:30 – Updated: 2022-12-12 20:46
VLAI?
Summary
Cross-site scripting vulnerability in TinyMCE alerts
Details

Impact

A cross-site scripting (XSS) vulnerability was discovered in the alert and confirm dialogs when these dialogs were provided with malicious HTML content. This can occur in plugins that use the alert or confirm dialogs, such as in the image plugin, which presents these dialogs when certain errors occur. The vulnerability allowed arbitrary JavaScript execution when an alert presented in the TinyMCE UI for the current user.

Patches

This vulnerability has been patched in TinyMCE 5.10.7 and TinyMCE 6.3.1 by ensuring HTML sanitization was still performed after unwrapping invalid elements.

Fix

To avoid this vulnerability: - Upgrade to TinyMCE 5.10.7 or higher for TinyMCE 5.x. - Upgrade to TinyMCE 6.3.1 or higher for TinyMCE 6.x.

Workaround

To reduce the impact of this vulnerability: - Ensure the the images_upload_handler returns a valid value as per the images_upload_handler documentation.

References

  • https://www.tiny.cloud/docs/release-notes/release-notes5107/#securityfixes
  • https://www.tiny.cloud/docs/tinymce/6/6.3-release-notes/#security-fixes

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 ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tinymce/tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "TinyMCE"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "tinymce/tinymce"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "TinyMCE"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-23494"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-08T23:30:01Z",
    "nvd_published_at": "2022-12-08T22:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the alert and confirm dialogs when these dialogs were provided with malicious HTML content. This can occur in plugins that use the alert or confirm dialogs, such as in the `image` plugin, which presents these dialogs when certain errors occur. The vulnerability allowed arbitrary JavaScript execution when an alert presented in the TinyMCE UI for the current user.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.10.7 and TinyMCE 6.3.1 by ensuring HTML sanitization was still performed after unwrapping invalid elements.\n\n### Fix\nTo avoid this vulnerability:\n- Upgrade to TinyMCE 5.10.7 or higher for TinyMCE 5.x.\n- Upgrade to TinyMCE 6.3.1 or higher for TinyMCE 6.x.\n\n### Workaround\nTo reduce the impact of this vulnerability:\n- Ensure the the `images_upload_handler` returns a valid value as per the images_upload_handler documentation.\n\n### References\n- https://www.tiny.cloud/docs/release-notes/release-notes5107/#securityfixes\n- https://www.tiny.cloud/docs/tinymce/6/6.3-release-notes/#security-fixes\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-gg8r-xjwq-4w92",
  "modified": "2022-12-12T20:46:53Z",
  "published": "2022-12-08T23:30:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tinymce/tinymce/security/advisories/GHSA-gg8r-xjwq-4w92"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23494"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tinymce/tinymce/commit/6923d85eba6de3e08ebc9c5a387b5abdaa21150e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tinymce/tinymce/commit/8bb2d2646d4e1a718fce61a775fa22e9d317b32d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tinymce/tinymce"
    },
    {
      "type": "WEB",
      "url": "https://www.tiny.cloud/docs/release-notes/release-notes5107/#securityfixes"
    },
    {
      "type": "WEB",
      "url": "https://www.tiny.cloud/docs/tinymce/6/6.3-release-notes/#security-fixes"
    },
    {
      "type": "WEB",
      "url": "https://www.tiny.cloud/docs/tinymce/6/file-image-upload/#images_upload_handler"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cross-site scripting vulnerability in TinyMCE alerts"
}


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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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