Security Advisory

CVE-2026-77637

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-09-22 15:30:59

Last updated 2026-09-22 17:43:54

Assigner GitHub_M

CVSS score 3.8

State PUBLISHED

Description

Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, tool.GET("wopi") and tool.POST("mail") in routers/router.go inherit ScopeAdminRead but omit the RequiredScopes(types.ScopeAdminWrite) middleware applied to neighboring state-changing admin tool routes. An OAuth application or API key limited to Admin.Read can therefore probe configured WOPI service endpoints and send arbitrary test email through the server SMTP configuration, exceeding the token's intended read-only authorization boundary. This issue is fixed in version 4.18.0.

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