Cross-Site Scripting (XSS) in 1millionbot’s AI chatbot platform
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| 1millionbot | AI Chatbot Platform (SaaS) de 1millionbot. | Version prior to CVE publication | — | No fix listed | CNA |
- AI Chatbot Platform (SaaS) de 1millionbot. Vendor1millionbot Affected Version prior to CVE publication Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-91921
- 2026-10-03 Alias added: GHSA-rf8x-cp2v-q2fg
References
More 1millionbot vulnerabilities
- TI-2026-03826 Multiple vulnerabilities in 1millionbot Millie chatbot CVSS 4.0HIGH 8.7
- TI-2026-03827 Multiple vulnerabilities in 1millionbot Millie chatbot CVSS 4.0HIGH 7.0
Sources
- CVE-2026-91921 · CVE Program
- CVE-2026-91921 · NVD
- FIRST EPSS
- GHSA-rf8x-cp2v-q2fg · GitHub Advisory Database · CC BY 4.0
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