Authorization Bypass in Nextcloud Approval App Affects Multiple Versions
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 contains a vulnerability that allows an authenticated user, listed as a requester in a workflow, to initiate a file approval process without having the necessary access rights. This is achieved by utilizing the numeric file ID to set a target user's file into a 'pending approval' status. This flaw compromises the integrity of the file approval workflow and was addressed in versions 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

.