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CVE-2026-30048

MediumPublished

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...

Published: Mar 18, 2026
Updated: Mar 19, 2026
Assigning CNA: mitre
Evidence observed: Aug 25, 2026

Primary CVSS

5.4/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 16.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-30048PoC
Stored XSS vulnerability in NotChatbot WebChat <=1.5.0 with PoC payloads, impact analysis, and remediation guidance for secure chat history rendering.

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