5.0
MEDIUM
CVE-2024-23336
MyBB Server-Side Request Forgery (SSRF) 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.

INFO

Published Date :

May 1, 2024, 7:15 a.m.

Last Modified :

Nov. 21, 2024, 8:57 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.4

Exploitability Score :

1.6
Public PoC/Exploit Available at Github

CVE-2024-23336 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2024-23336 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mybb mybb

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Updated: 3 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : March 3, 2022, 2:23 p.m. This repo has been linked 9 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-23336 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-23336 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://docs.mybb.com/1.8/administration/configuration-file
    Added Reference https://github.com/mybb/mybb/commit/d6a96019025de9149014e06b1df252e6122e5630
    Added Reference https://github.com/mybb/mybb/security/advisories/GHSA-qfrj-65mv-h75h
    Added Reference https://mybb.com/versions/1.8.38
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by [email protected]

    May. 01, 2024

    Action Type Old Value New Value
    Added 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.
    Added Reference GitHub, Inc. https://github.com/mybb/mybb/security/advisories/GHSA-qfrj-65mv-h75h [No types assigned]
    Added Reference GitHub, Inc. https://github.com/mybb/mybb/commit/d6a96019025de9149014e06b1df252e6122e5630 [No types assigned]
    Added Reference GitHub, Inc. https://docs.mybb.com/1.8/administration/configuration-file [No types assigned]
    Added Reference GitHub, Inc. https://mybb.com/versions/1.8.38 [No types assigned]
    Added CWE GitHub, Inc. CWE-918
    Added CWE GitHub, Inc. CWE-184
    Added CVSS V3.1 GitHub, Inc. AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability