INCIBE-CERT Reports Fixed 1millionbot Chatbot XSS
Tech GuruQuick Answer
INCIBE-CERT's INCIBE-2026-651 describes CVE-2026-91921 in 1millionbot's hosted chatbot. Unsanitized Markdown or content blocks could render external hyperlinks within the user's own interactive session. The provider applied a managed-service fix; there is no customer package version to install.
Confirm Scope And Apply The Supported Fix
What to do now: Identify the organization's 1millionbot service and integrations, confirm the provider's fix applies to that service, and validate approved chat and link-rendering behavior. Retain the provider confirmation with the service owner's change record.
Last verified: 2026-09-21 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | 1millionbot AI Chatbot Platform SaaS before the coordinated fix |
|---|---|
| Advisory | INCIBE-2026-651 |
| CVE | CVE-2026-91921 |
| CVE record publication | 2026-09-21 09:43:37.622 UTC |
| Recorded CVE revision (historical snapshot) | 2026-09-21 11:12:43.964 UTC |
| Affected versions | 1millionbot AI Chatbot Platform SaaS before the coordinated fix |
| Fixed version | Managed-service fix applied by 1millionbot; no customer build number |
| CVSS base score | 5.1 (CVSS v4.0) |
| CVSS severity | Medium |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
The authority classifies the rendering issue as cross-site scripting. Its reported impact is limited to the user's own interactive session: no internal-infrastructure compromise, access to third-party data, or effect on administrative panels was identified. Preserve those limits rather than extending the XSS label to a tenant takeover claim.
What To Validate Now
- Inventory. Record the hosted chatbot service, business owner, embedded interfaces, and integrations used by the organization.
- Establish applicability. Confirm the service was covered by the coordinated provider fix. The advisory supplies no customer-side build identifier, so an asset version scan alone cannot establish completion.
- Remediate. Obtain confirmation of the managed-service fix from 1millionbot and follow any provider instructions for the organization's integration. Do not attempt to install a nonexistent customer patch package.
- Validate. Confirm the resulting version or managed-service state, exercise representative functionality and recovery paths, monitor for regressions, and document exceptions.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Validate normal chat rendering and links through the actual integration, and preserve relevant session evidence if unexpected content was displayed. This service notice does not justify server-package changes, cluster restarts, or claims of compromise beyond the authority's stated session boundary.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
