SimpleChat: Authenticated users can access other users' profile metadata through user IDOR endpoints

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57205
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-16 16:19:14 UTC
Updated2026-07-16 17:13:54 UTC
DescriptionSimpleChat 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.005000000 probability, percentile 0.395700000 (date 2026-07-20)

Problem Types: CWE-200 | CWE-639 | CWE-862 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Simplechat affected < 0.241.203 Not specified

References

ReferenceSourceLinkTags
github.com/microsoft/simplechat/releases/tag/v0.250.001 [email protected] github.com
github.com/microsoft/simplechat/security/advisories/GHSA-x2jq-2m5m-65m4 [email protected] github.com
github.com/microsoft/simplechat/blob/main/docs/explanation/fixes/USER_PR... [email protected] github.com
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