Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mybb | Mybb | < 1.8.38 |
Related Weaknesses (CWE)
References
- https://docs.mybb.com/1.8/administration/configuration-fileProduct
- https://github.com/mybb/mybb/commit/d6a96019025de9149014e06b1df252e6122e5630Patch
- https://github.com/mybb/mybb/security/advisories/GHSA-qfrj-65mv-h75hVendor Advisory
- https://mybb.com/versions/1.8.38ProductRelease Notes
- https://docs.mybb.com/1.8/administration/configuration-fileProduct
- https://github.com/mybb/mybb/commit/d6a96019025de9149014e06b1df252e6122e5630Patch
- https://github.com/mybb/mybb/security/advisories/GHSA-qfrj-65mv-h75hVendor Advisory
- https://mybb.com/versions/1.8.38ProductRelease Notes
FAQ
What is CVE-2024-23336?
CVE-2024-23336 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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) vulnerabil...
How severe is CVE-2024-23336?
CVE-2024-23336 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-23336?
Check the references section above for vendor advisories and patch information. Affected products include: Mybb Mybb.