Vulnerability · Published Sep 21, 2026 · Assigned by INCIBE
CVE-2026-91921Cross-Site Scripting (XSS) in 1millionbot’s AI chatbot platform
Medium 5.1
In plain English
A medium-severity cross-site scripting in AI Chatbot Platform (SaaS) de 1millionbot. from 1millionbot. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| 1millionbot | AI Chatbot Platform (SaaS) de 1millionbot. | Version prior to CVE publication |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N