CVE-2024-22402: guests — Fix

Description

Nextcloud guests app is a utility to create guest users which can only see files shared with them. In affected versions users were able to load the first page of apps they were actually not allowed to access. Depending on the selection of apps installed this may present a permissions bypass. It is recommended that the Guests app is upgraded to 2.4.1, 2.5.1 or 3.0.1. There are no known workarounds for this vulnerability.

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CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-281 CWE-281

Affected Products

Vendor	Product	Versions
nextcloud	guests	< 2.4.1
nextcloud	guests	All
nextcloud	guests	All

References

Advisories & Patches

https://github.com/nextcloud/guests/pull/1082 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v3qw-7vgv-2fxj https://github.com/nextcloud/guests/pull/1082 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v3qw-7vgv-2fxj

Other References

https://hackerone.com/reports/2251074 https://hackerone.com/reports/2251074

Frequently Asked Questions

What is CVE-2024-22402? +

Nextcloud guests app is a utility to create guest users which can only see files shared with them. In affected versions users were able to load the first page of apps they were actually not allowed to access. Depending on the selection of apps installed this may present a permissions bypass. It is recommended that the Guests app is upgraded to 2.4.1, 2.5.1 or 3.0.1. There are no known workarounds for this vulnerability. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2024-22402? +

CVE-2024-22402 has a CVSS v3.1 score of 5.4 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-2024-22402? +

CVE-2024-22402 affects products from nextcloud, specifically: guests. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-22402? +

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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