ghsa-95qr-67rx-9pgh
Vulnerability from github
Published
2022-05-24 17:37
Modified
2023-08-23 13:41
Summary
Umbraco CMS vulnerable to stored XSS
Details

A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user can inject arbitrary JavaScript code into iframes when editing content using the TinyMCE rich-text editor, as TinyMCE is configured to allow iframes by default in Umbraco CMS.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "UmbracoCms.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "8.9.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-5809"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-07-13T22:32:02Z",
    "nvd_published_at": "2020-12-30T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "A stored XSS vulnerability exists in Umbraco CMS \u003c= 8.9.1 or current. An authenticated user can inject arbitrary JavaScript code into iframes when editing content using the TinyMCE rich-text editor, as TinyMCE is configured to allow iframes by default in Umbraco CMS.",
  "id": "GHSA-95qr-67rx-9pgh",
  "modified": "2023-08-23T13:41:55Z",
  "published": "2022-05-24T17:37:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5809"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/umbraco/Umbraco-CMS"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/security/research/tra-2020-59"
    }
  ],
  "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": "Umbraco CMS vulnerable to stored XSS"
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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