by Kastro
Paper/Archive/CVE-2026-24399

CVE-2026-24399

chattermate chattermate.chat — ChatterMate has Stored Cross-Site Scripting (XSS) via Chatbot Input Execution

EPSS 0.3%CVSS 9.3
critical.is priorityof 100
33
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 27.1.271 × 205.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

ChatterMate is a no-code AI chatbot agent framework. In versions 1.0.8 and below, the chatbot accepts and executes malicious HTML/JavaScript payloads when supplied as chat input. Specifically, an <iframe> payload containing a javascript: URI can be processed and executed in the browser context. This allows access to sensitive client-side data such as localStorage tokens and cookies, resulting in client-side injection. This issue has been fixed in version 1.0.9.

Affected

ProductAffectedFixed inSource
chattermate.chat< 1.0.9–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/chattermate/chattermate.chat/security/advisories/GHSA-72p3-w95w-q3j4refgithub.com/chattermate/chattermate.chat/commit/ff3398031abb97ae28546eaf993fed3619eaffddrefgithub.com/chattermate/chattermate.chat/releases/tag/v1.0.9