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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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-91921

Published

AI Chatbot Platform (SaaS) de 1millionbot.

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "1millionbot",
                    "product": "AI Chatbot Platform (SaaS) de 1millionbot.",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "Version prior to CVE publication"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON