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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
cloudreve:cloudreve
References 3
https://github.com/cloudreve/cloudreve/commit/bce08f88e9d8f881e78fd18e7a6598b31…
security-advisories@github.com
https://github.com/cloudreve/cloudreve/releases/tag/4.18.0
security-advisories@github.com
https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w89x-c962-c44g
security-advisories@github.com