🛡️ CVE-2024-23336
🟡 CVSS 5.0 — Medium ✅ No Known Exploit CWE-184 NVD
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

MyBB is a free and open source forum software. The default list of disallowed remote hosts does not contain the `127.0.0.0/8` block, which may result in a Server-Side Request Forgery (SSRF) vulnerability. The Configuration File's _Disallowed Remote Addresses_ list (`$config['disallowed_remote_addresses']`) contains the address `127.0.0.1`, but does not include the complete block `127.0.0.0/8`. MyBB 1.8.38 resolves this issue in default installations. Administrators of installed boards should update the existing configuration (`inc/config.php`) to include all addresses blocked by default. Additionally, users are advised to verify that it includes any other IPv4 addresses resolving to the server and other internal resources. Users unable to upgrade may manually add 127.0.0.0/8' to their disallowed address list.

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE CWE-184
Public Exploit ✅ No
Source NVD
Published 2024-05-01
Updated 2026-06-02
Modified 2025-06-30

Affected Packages

Software From version Fixed in
mybb 1.8.38

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