Unauthenticated User Enumeration Vulnerability in ownCloud Guests Plugin
CVE-2025-59716
5.3MEDIUM
What is CVE-2025-59716?
The ownCloud Guests plugin prior to version 0.12.5 allows unauthenticated users to exploit the /apps/guests/register/{email}/{token} endpoint for user enumeration. This arises from inadequate validation of the provided token within the showPasswordForm method. Consequently, the server generates distinct responses based on whether an email address corresponds to an existing pending guest user or not, potentially exposing user data to unauthorized individuals.
References
CVSS V3.1
Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged
Timeline
Vulnerability published
Vulnerability Reserved