#VU71384 Improper access control in Flarum - CVE-2023-22487

Vulnerability identifier: #VU71384

Vulnerability risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-22487

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Flarum
Web applications / Other software

Vendor: Flarum

Description

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

The vulnerability exists due to improper access restrictions. A remote user can bypass implemented security restrictions and read any post on the forum.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Flarum: 1.0.0 - 1.6.2

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External links
https://github.com/flarum/framework/commit/ab1c868b978e8b0d09a5d682c54665dae17d0985
https://github.com/flarum/framework/security/advisories/GHSA-22m9-m3ww-53h3

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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.