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Approval app allows users to request approval for other users file

Low
nickvergessen published GHSA-q26g-fmjq-x5g5 Dec 5, 2025

Package

Approval (Nextcloud)

Affected versions

>= 1.0.0, >= 2.0.0

Patched versions

1.3.1, 2.5.0

Description

Impact

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.

Patches

It is recommended that Nextcloud Approval is upgraded to 2.5.0.

Workarounds

  • Disable the Approval app

References

For more information

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Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

CVE ID

CVE-2025-66515

Weaknesses

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Learn more on MITRE.

Credits