GHSA-G3FQ-3V3G-MH32

Vulnerability from github – Published: 2021-04-16 19:52 – Updated: 2021-04-13 18:40
VLAI?
Summary
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in @nextcloud/dialogs
Details

Impact

The Nextcloud dialogs library before 3.1.2 did insufficiently escape text input passed to a toast. If your application displays toasts with user-supplied input, this could lead to a XSS vulnerability.

Note: Nextcloud Server employs a strict Content Security Policy that mitigates the risk of these XSS vulnerabilities.

Patches

The vulnerability has been patched in version 3.1.2. If you need to display HTML in the toast, explicitly pass the options.isHTML config flag.

Workarounds

Make sure no user-supplied input flows into toasts.

Severity ?
4.6 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@nextcloud/dialogs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-29438"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79",
      "CWE-80"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-04-13T18:40:52Z",
    "nvd_published_at": "2021-04-13T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nThe Nextcloud dialogs library before 3.1.2 did insufficiently escape text input passed to a toast. If your application displays toasts with user-supplied input, this could lead to a XSS vulnerability.\n\n_Note_: Nextcloud Server employs a strict Content Security Policy that mitigates the risk of these XSS vulnerabilities.\n\n### Patches\n\nThe vulnerability has been patched in version 3.1.2. If you need to display HTML in the toast, explicitly pass the `options.isHTML` config flag.\n\n### Workarounds\n\nMake sure no user-supplied input flows into toasts.",
  "id": "GHSA-g3fq-3v3g-mh32",
  "modified": "2021-04-13T18:40:52Z",
  "published": "2021-04-16T19:52:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nextcloud/nextcloud-dialogs/security/advisories/GHSA-g3fq-3v3g-mh32"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29438"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@nextcloud/dialogs"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in @nextcloud/dialogs"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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