Nextcloud Approval app allows users to request approval for other users file
CVE-2025-66515

2.7LOW

Key Information:

Vendor

Nextcloud
Status
Security-advisories
Vendor
CVE Published:
5 December 2025

What is CVE-2025-66515?

The Nextcloud Approval app allows approval or disapproval of files in the sidebar. Prior to 1.3.1 and 2.5.0, an authenticated user listed as a requester in a workflow can set another user’s file into the “pending approval” without access to the file by using the numeric file id. This vulnerability is fixed in 1.3.1 and 2.5.0.

Affected Version(s)

security-advisories >= 2.0.0, < 2.5.0 < 2.0.0, 2.5.0

security-advisories < 1.3.1 < 1.3.1

References

https://github.com/nextcloud/security-advisories/security...
x_refsource_CONFIRM
https://github.com/nextcloud/approval/pull/334
x_refsource_MISC
https://github.com/nextcloud/approval/commit/e30b56b78322...
x_refsource_MISC

CVSS V3.1

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-66515 : Authorization Bypass in Nextcloud Approval App Affects Multiple Versions