Flarum is an open source forum software. Flarum is affected by a vulnerability that allows an attacker to conduct a Blind Server-Side Request Forgery (SSRF) attack or disclose any file on the server, even with a basic user account on any Flarum forum. By uploading a file containing a URL and spoofing the MIME type, an attacker can manipulate the application to execute unintended actions. The vulnerability is due to the behavior of the `intervention/image` package, which attempts to interpret the supplied file contents as a URL, which then fetches its contents. This allows an attacker to exploit the vulnerability to perform SSRF attacks, disclose local file contents, or conduct a blind oracle attack. This has been patched in Flarum version 1.8.0. Users are advised to upgrade. Users unable to upgrade may disable PHP's `allow_url_fopen` which will prevent the fetching of external files via URLs as a temporary workaround for the SSRF aspect of the vulnerability.
History

Wed, 02 Oct 2024 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-08-16T20:34:11.445Z

Updated: 2024-10-02T16:00:40.870Z

Reserved: 2023-08-08T13:46:25.244Z

Link: CVE-2023-40033

cve-icon Vulnrichment

Updated: 2024-08-02T18:24:54.634Z

cve-icon NVD

Status : Modified

Published: 2023-08-16T21:15:09.987

Modified: 2024-11-21T08:18:33.877

Link: CVE-2023-40033

cve-icon Redhat

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