CVE-2026-91921
📛 CVE Title
Cross-Site Scripting (XSS) in 1millionbot’s AI chatbot platform
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- INCIBE
- CVSS severity
- MEDIUM
- CVSS score
- 5.1 / 10
- CVSS 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- Effective score
- 5.1 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-79 - Reserved
- 2026-09-15
- Published
- 2026-09-21 09:43 UTC
- Last updated
- 2026-09-21 11:12 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/91xxx/CVE-2026-91921.json
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-09-21 10:17:15 UTC
- NVD last modified
- 2026-09-21 12:17:25 UTC
NVD / KEV / EPSS data refreshed 2026-09-22 03:13 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-83880 - Assigner
- INCIBE
- Published
- Sep 21, 2026, 9:43:37 AM
- Updated
- Sep 21, 2026, 11:12:43 AM
- EUVD base score (CVSS 4.0)
-
5.1 / 10
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 - EUVD-reported EPSS
- 0.0000
- Vendors
- 1millionbot
- Products
-
AI Chatbot Platform (SaaS) de 1millionbot. (Version prior to CVE publication)
- Aliases
-
GHSA-rf8x-cp2v-q2fg
ENISA 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 (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| 1millionbot | AI Chatbot Platform (SaaS) de 1millionbot. |
Version prior to CVE publication (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-xss-1millionbots-ai-chatbot-platform cve-coordination@incibe.es
Remediations (10)
-
web:arcticwolf.com
Threat Summary On June 9, 2026 , Microsoft released its regular Patch Tuesday security update, fixing 206 vulnerabilities (with 39 rated Critical) affecting a broad spectrum of Microsoft products including Windows kernel, Hyper-V, Remote Desktop Client, Kerberos, DHCP, BitLocker, HTTP.sys, Exchange Server, and Office. This is the largest number of vulnerabilities ever disclosed in a single ...
2026-09-22 17:07 UTC -
web:byteiota.com
That's not all. September's Patch Tuesday also fixed two zero-days under active exploitation: CVE - 2026 -85880, a heap buffer overflow in Windows ALPC that allows local privilege escalation to SYSTEM, and CVE - 2026 -81963, a link-following flaw in the Windows Update Stack. Rolling back removes those fixes too.
2026-09-22 17:07 UTC -
web:kb.netgear.com
NETGEAR's Product Security Team has assessed the following product vulnerabilities and provided guidance to address these vulnerabilities in the table below. Because firmware updates contain security fixes, bug fixes, and new features for your products, we strongly advise you to enable automatic firmware updates on supported devices. For older products, we advise you to download and ...
2026-09-22 17:07 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-09-22 17:07 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-09-22 17:07 UTC -
web:senserva.com
You work the top of the list instead of chasing every Critical, and each finding carries the patch , the KB, and a validated fix to apply. What is CVE remediation , and how does Senserva do it? CVE remediation is closing the exposure a vulnerability creates, usually by applying the patch or a configuration change.
2026-09-22 17:07 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-09-22 17:07 UTC -
web:support.microsoft.com
This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures ( CVE ): CVE - 2026 -62910 - Microsoft Common Vulnerabilities and Exposures CVE - 2026 -62911 - Microsoft Common Vulnerabilities and Exposures CVE - 2026 -62912 - Microsoft Common Vulnerabilities and Exposures CVE - 2026 -62913 ...
2026-09-22 17:07 UTC -
web:trinetriops.com
Microsoft's September 2026 Patch Tuesday fixes 992 vulnerabilities across Windows, Microsoft Office and SQL Server - 132 rated Critical, 2 already exploited in the wild. Patch CVE - 2026 -81963 first. Full CVE list with severity, CVSS, affected components and KB numbers, plus what to deploy first.
2026-09-22 17:07 UTC -
web:www.messageware.com
Microsoft's September 2026 Exchange Server security updates patch 9 vulnerabilities, including a 9.3-severity spoofing flaw.
2026-09-22 17:07 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-91921.json.
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