Vulnerability Monitor

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CVE-2024-23336

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.0, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction requiring only low-level privileges . The vulnerability impacts limited data confidentiality, limited integrity, and limited availability for affected systems. Impacting 1 product from mybb organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2024, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2024-05-01T07:15:38.660

Last Modified

2025-06-30T15:10:32.987

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 5.0 (MEDIUM)

Weaknesses

Type: Secondary
CWE-184
CWE-918

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mybb	mybb	< 1.8.38	Yes

References

https://docs.mybb.com/1.8/administration/configuration-file Product ([email protected])
https://github.com/mybb/mybb/commit/d6a96019025de9149014e06b1df252e6122e5630 Patch ([email protected])
https://github.com/mybb/mybb/security/advisories/GHSA-qfrj-65mv-h75h Vendor Advisory ([email protected])
https://mybb.com/versions/1.8.38 Product, Release Notes ([email protected])
https://docs.mybb.com/1.8/administration/configuration-file Product (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/mybb/mybb/commit/d6a96019025de9149014e06b1df252e6122e5630 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/mybb/mybb/security/advisories/GHSA-qfrj-65mv-h75h Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://mybb.com/versions/1.8.38 Product, Release Notes (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mybb's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.