CVE-2026-30048

MEDIUM

NotChatbot WebChat thru 1.4.4 - XSS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-30048. PoCs published by 0xN4no.

AI-analyzed exploit summary The repository provides a detailed technical analysis of CVE-2026-30048, a stored XSS vulnerability in the @developer.notchatbot/webchat package. It includes payload examples, root cause analysis, and mitigation suggestions, demonstrating a clear understanding of the vulnerability.

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.

Exploits (1)

nomisec WRITEUP
by 0xN4no · poc
https://github.com/0xN4no/CVE-2026-30048

The repository provides a detailed technical analysis of CVE-2026-30048, a stored XSS vulnerability in the @developer.notchatbot/webchat package. It includes payload examples, root cause analysis, and mitigation suggestions, demonstrating a clear understanding of the vulnerability.

Classification
Writeup 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: @developer.notchatbot/webchat <= 1.5.0
No auth needed
Prerequisites: Integration of the vulnerable WebChat widget
devstral-2 · analyzed May 03, 2026 Full analysis →

Scores

CVSS v3 5.4
EPSS 0.0001
EPSS Percentile 2.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
developer.notchatbot/webchat 0npm
Published Mar 18, 2026
Tracked Since Mar 18, 2026