CVE-2026-57205
MediumCVSS 4.3Exploitation Probability (EPSS)
Elevated risk60th percentile - higher than 60% of all known CVEs
Summary
In SimpleChat prior to version 0.241.203, the authenticated GET /api/user/info/<user_id> and GET /api/user/profile-image/<user_id> endpoints lacked object-level authorization. A low-privilege authenticated user could supply an arbitrary user_id and read the corresponding Cosmos DB user-settings document, retrieving another user's email address, display name, and profile image.
Risk Assessment
The organization is at risk of leaking sensitive personal data (email, display name, profile image) of users by any authenticated user, potentially violating privacy regulations such as GDPR.
Recommendation
Immediately upgrade SimpleChat to version 0.241.203 or later, which fixes the missing object-level authorization.
Other vulnerabilities in SimpleChat
See all- CVE-2026-105798High
SimpleChat versions prior to 0.261.029 contain an XSS vulnerability in POST /api/group_documents/upload. An attacker with Owner, Admin, or DocumentManager privileges can persist a script that executes in the SimpleChat origin when another group member clicks Share, allowing access to victim-visible data and actions. This is fixed in version 0.261.029.
- CVE-2026-105797High
SimpleChat versions 0.261.003 and 0.261.027 contain an authorization ordering flaw in POST /api/user/plugins that allows an authenticated low-privileged user to bypass the _reject_non_admin_mcp_stdio check. This can lead to starting an attacker-selected OS process under the application service identity. This is fixed in version 0.261.031.
- CVE-2026-57206High
In SimpleChat prior to version 0.241.206, several plugin validation routes lacked enforcement of authentication and authorization at runtime. Routes such as POST /api/admin/plugins/test-instantiation, GET /api/admin/plugins/health-check/<plugin_name>, POST /api/admin/plugins/repair/<plugin_name>, and POST /api/plugins/validate were documented as requiring security but did not check if the user was logged in or had proper permissions. This allowed unauthenticated or unauthorized clients to invoke plugin validation, health check, and repair operations.
Original NVD description (English source)
SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.203, the authenticated GET /api/user/info/<user_id> and GET /api/user/profile-image/<user_id> endpoints in application/single_app/route_backend_users.py accepted a caller-supplied user_id and read the matching Cosmos DB user-settings document without object-level authorization, allowing a low-privilege authenticated user to retrieve another user's email address, display name, and profile image. This issue is fixed in version 0.241.203.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS