CVE-2024-52514: nextcloud server Access Control Flaw

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.

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CVSS v3.1 Score

4.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

Weakness Type (CWE)

CWE-284 CWE-284

Affected Products

Vendor	Product	Versions
nextcloud	nextcloud_server	21.0.0 — 21.0.9.18
nextcloud	nextcloud_server	22.0.0 — 22.2.10.23
nextcloud	nextcloud_server	23.0.0 — 23.0.12.18
nextcloud	nextcloud_server	24.0.0 — 24.0.12.14
nextcloud	nextcloud_server	25.0.0 — 25.0.13.9
nextcloud	nextcloud_server	26.0.0 — 26.0.13.3
nextcloud	nextcloud_server	27.0.0 — 27.1.9
nextcloud	nextcloud_server	27.0.0 — 27.1.9
nextcloud	nextcloud_server	28.0.0 — 28.0.5
nextcloud	nextcloud_server	28.0.0 — 28.0.5

References

Advisories & Patches

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g8pr-g25r-58xj https://github.com/nextcloud/server/commit/5fffbcfe8650eab75b00e8d188fbc95b0e43f3a8

Other References

https://github.com/nextcloud/server/pull/44889 https://hackerone.com/reports/2447316

Frequently Asked Questions

What is CVE-2024-52514? +

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. It has a CVSS v3.1 base score of 4.1 (MEDIUM).

How severe is CVE-2024-52514? +

CVE-2024-52514 has a CVSS v3.1 score of 4.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-52514? +

CVE-2024-52514 affects products from nextcloud, specifically: nextcloud_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-52514? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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