CVE-2026-91921

MEDIUM CVSS 4.0: 5.1 EPSS 0.60%
Updated Sep 22, 2026
1Millionbot
Parameter Value
CVSS 5.1 (MEDIUM)
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor 1Millionbot
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Active
User action required

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
1millionbot Ai_Chatbot_Platform_Saas_De_1millionbot.
cpe:2.3:a:1millionbot:ai_chatbot_platform_saas_de_1millionbot.:version_prior_to_cve_publication:*:*:*:*:*:*:*
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