#VU85602 Improper Handling of URL Encoding (Hex Encoding) in Guests - CVE-2024-22402

Vulnerability identifier: #VU85602

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-22402

CWE-ID: CWE-177

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Guests
Web applications / Modules and components for CMS

Vendor: Nextcloud

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper handling of request URLs in Guests app. A remote user can load the pages of apps they are not allowed to access.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Guests: 2.4.0 - 3.0.0

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External links
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v3qw-7vgv-2fxj
https://github.com/nextcloud/guests/pull/1082
https://hackerone.com/reports/2251074

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.