GitHub Advisoryadvisory · npm

GHSA-w3vx-52j6-9fjp NotChatbot WebChat has a stored cross-site scripting (XSS) vulnerability

MEDIUM Published 2026-03-18 Modified 2026-03-19 Official page ↗
Aliases
CVE-2026-30048
Ecosystem
npm
Packages
@developer.notchatbot/webchat
Severity
Moderate
CVSS vector
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
Weaknesses
CWE-79
Reviewed
2026-03-19

Affected packages

• npm @developer.notchatbot/webchat: <= 1.5.0 (no fix yet)

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.

Related

Alias · CVE (1)

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

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References