CVE-2024-23336
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.
Does this matter?
Lower severity and a low EPSS score (0.46%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.0 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 0.46% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-184, CWE-918
- Affected
- mybb/mybb
- Source
- security-advisories@github.com
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/1.8.38Product, Release 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/1.8.38Product, Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.