CVE-2024-37882: nextcloud server Access Control Flaw

Description

Nextcloud Server is a self hosted personal cloud system. A recipient of a share with read&share permissions could reshare the item with more permissions. It is recommended that the Nextcloud Server is upgraded to 26.0.13 or 27.1.8 or 28.0.4 and that the Nextcloud Enterprise Server is upgraded to 26.0.13 or 27.1.8 or 28.0.4.

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CVSS v3.1 Score

8.1

HIGH

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

Weakness Type (CWE)

CWE-284 CWE-284

CWE-281 CWE-281

Affected Products

Vendor	Product	Versions
nextcloud	nextcloud_server	26.0.0 — 26.0.13
nextcloud	nextcloud_server	27.0.0 — 27.1.8
nextcloud	nextcloud_server	28.0.0 — 28.0.4
nextcloud	nextcloud_server	23.0.0 — 23.0.12.17
nextcloud	nextcloud_server	24.0.0 — 24.0.12.13
nextcloud	nextcloud_server	25.0.0 — 25.0.13.8
nextcloud	nextcloud_server	26.0.0 — 26.0.13
nextcloud	nextcloud_server	27.0.0 — 27.1.8
nextcloud	nextcloud_server	28.0.0 — 28.0.4

References

Advisories & Patches

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jjm3-j9xh-5xmq https://github.com/nextcloud/server/pull/44339 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jjm3-j9xh-5xmq https://github.com/nextcloud/server/pull/44339

Other References

https://hackerone.com/reports/2289425 https://hackerone.com/reports/2289425

Frequently Asked Questions

What is CVE-2024-37882? +

Nextcloud Server is a self hosted personal cloud system. A recipient of a share with read&share permissions could reshare the item with more permissions. It is recommended that the Nextcloud Server is upgraded to 26.0.13 or 27.1.8 or 28.0.4 and that the Nextcloud Enterprise Server is upgraded to 26.0.13 or 27.1.8 or 28.0.4. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2024-37882? +

CVE-2024-37882 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-37882? +

CVE-2024-37882 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-2024-37882? +

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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