CVE-2024-52518: nextcloud server Auth Bypass — Fix

Description

Nextcloud Server is a self hosted personal cloud system. After an attacker got access to the session of a user or administrator, the attacker would be able to create, change or delete external storages without having to confirm the password. It is recommended that the Nextcloud Server is upgraded to 28.0.12, 29.0.9 or 30.0.2.

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CVSS v3.1 Score

4.4

MEDIUM

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

Weakness Type (CWE)

CWE-287 Improper Authentication

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
nextcloud	nextcloud_server	28.0.0 — 28.0.12
nextcloud	nextcloud_server	28.0.0 — 28.0.12
nextcloud	nextcloud_server	29.0.0 — 29.0.9
nextcloud	nextcloud_server	29.0.0 — 29.0.9
nextcloud	nextcloud_server	30.0.0 — 30.0.2
nextcloud	nextcloud_server	30.0.0 — 30.0.2

References

Advisories & Patches

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vrhf-532w-99rg

Other References

https://github.com/nextcloud/server/pull/48373 https://github.com/nextcloud/server/pull/48788 https://github.com/nextcloud/server/pull/48992 https://hackerone.com/reports/2602973

Frequently Asked Questions

What is CVE-2024-52518? +

Nextcloud Server is a self hosted personal cloud system. After an attacker got access to the session of a user or administrator, the attacker would be able to create, change or delete external storages without having to confirm the password. It is recommended that the Nextcloud Server is upgraded to 28.0.12, 29.0.9 or 30.0.2. It has a CVSS v3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2024-52518? +

CVE-2024-52518 has a CVSS v3.1 score of 4.4 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-2024-52518? +

CVE-2024-52518 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-2024-52518? +

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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