GHSA-W3VX-52J6-9FJP

Vulnerability from github – Published: 2026-03-18 18:31 – Updated: 2026-03-19 12:50
VLAI?
Summary
NotChatbot WebChat has a stored cross-site scripting (XSS) vulnerability
Details

A stored cross-site scripting (XSS) vulnerability exists in the NotChatbot WebChat widget thru 1.4.4. User-supplied input is not properly sanitized before being stored and rendered in the chat conversation history. This allows an attacker to inject arbitrary JavaScript code which is executed when the chat history is reloaded. The issue is reproducible across multiple independent implementations of the widget, indicating that the vulnerability resides in the product itself rather than in a specific website configuration.

Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@developer.notchatbot/webchat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.5.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-30048"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-19T12:50:46Z",
    "nvd_published_at": "2026-03-18T18:16:27Z",
    "severity": "MODERATE"
  },
  "details": "A stored cross-site scripting (XSS) vulnerability exists in the NotChatbot WebChat widget thru 1.4.4. User-supplied input is not properly sanitized before being stored and rendered in the chat conversation history. This allows an attacker to inject arbitrary JavaScript code which is executed when the chat history is reloaded. The issue is reproducible across multiple independent implementations of the widget, indicating that the vulnerability resides in the product itself rather than in a specific website configuration.",
  "id": "GHSA-w3vx-52j6-9fjp",
  "modified": "2026-03-19T12:50:46Z",
  "published": "2026-03-18T18:31:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30048"
    },
    {
      "type": "WEB",
      "url": "https://app.unpkg.com/@developer.notchatbot/webchat@1.4.4"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/0xN4no/0601f398942a29259d217ea650f694fe"
    },
    {
      "type": "WEB",
      "url": "https://github.com/0xN4no/CVE-2026-30048"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/@developer.notchatbot/webchat"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "NotChatbot WebChat has a stored cross-site scripting (XSS) vulnerability"
}


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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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