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MyBB Server-Side Request Forgery (SSRF) Vulnerability - CVE-2024-23336 - Vulnerability Database
MyBB

MyBB Server-Side Request Forgery (SSRF) Vulnerability - CVE-2024-23336

Medium
Reference: CVE-2024-23336
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2024-23336
Title: MyBB Server-Side Request Forgery (SSRF) Vulnerability
Overview:

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 File39s _Disallowed Remote Addresses_ list (config39disallowed_remote_addresses39) 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 127.0.0.0/839 to their disallowed address list.