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CVE-2026-91921

Cross-Site Scripting (XSS) in 1millionbot’s AI chatbot platform

CVSS 4.0 5.1 MEDIUMCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-91921

Published

Cross-Site Scripting (XSS) vulnerability due to inadequate input sanitisation in the client-side rendering engine of the 1millionbot AI Chat Platform. An unauthenticated remote user could cause external hyperlinks to be rendered in the web interface by sending messages containing Markdown syntax and certain unsanitised content blocks. The impact is limited to the user’s own interactive session; no compromise of internal infrastructure, access to third-party data or impact on administrative panels has been identified.

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Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

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23 Oct 2026 15:48:27 UTC

Cross-Site Scripting (XSS) in 1millionbot’s AI chatbot platform

cve-program · CVE-2026-91921 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 13 Nov 14:14 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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