Improper Endpoint Protection in Nextcloud Server
CVE-2025-47791

4.3MEDIUM

Key Information:

Vendor

Nextcloud
Status
Security-advisories
Vendor
CVE Published:
16 May 2025

What is CVE-2025-47791?

An improper access control vulnerability was identified in Nextcloud Server and Nextcloud Enterprise Server, where a previously unused endpoint intended to verify share recipients was inadequately protected. This flaw allowed for the possibility of proxying requests to a different server, creating potential security risks. The problematic endpoint was effectively removed in subsequent releases (28.0.13, 29.0.10, 30.0.3), and currently, there are no reported workarounds to mitigate this issue in affected versions.

Affected Version(s)

security-advisories >= 28.0.0, < 28.0.13 < 28.0.0, 28.0.13

security-advisories >= 29.0.0, < 29.0.10 < 29.0.0, 29.0.10

security-advisories >= 30.0.0, < 30.0.3 < 30.0.0, 30.0.3

References

https://github.com/nextcloud/security-advisories/security...
x_refsource_CONFIRM
https://github.com/nextcloud/server/pull/49558
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.