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.
Source: GitHub, Inc.
Max CVSS
5.0
EPSS Score
0.06%
Published
2024-05-01
Updated
2024-05-01
MyBB is a free and open source forum software. The backup management module of the Admin CP may accept `.htaccess` as the name of the backup file to be deleted, which may expose the stored backup files over HTTP on Apache servers. MyBB 1.8.38 resolves this issue. Users are advised to upgrade. There are no known workarounds for this vulnerability
Source: GitHub, Inc.
Max CVSS
4.7
EPSS Score
0.05%
Published
2024-05-01
Updated
2024-05-01
MyBB is a free and open source forum software. Custom MyCode (BBCode) for the visual editor (_SCEditor_) doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. This weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as a post or Private Message) and operates on a maliciously crafted MyCode message. This may occur on pages where message content is pre-filled using a GET/POST parameter, or on reply pages where a previously saved malicious message is quoted. The impact is be mitigated when: 1. the visual editor is disabled globally (_Admin CP → Configuration → Settings → Clickable Smilies and BB Code: [Clickable MyCode Editor](https://github.com/mybb/mybb/blob/mybb_1836/install/resources/settings.xml#L2087-L2094)_ is set to _Off_), or 2. the visual editor is disabled for individual user accounts (_User CP → Your Profile → Edit Options_: _Show the MyCode formatting options on the posting pages_ checkbox is not checked). MyBB 1.8.37 resolves this issue with the commit `6dcaf0b4d`. Users are advised to upgrade. Users unable to upgrade may mitigate the impact without upgrading MyBB by changing the following setting (_Admin CP → Configuration → Settings_): - _Clickable Smilies and BB Code → [Clickable MyCode Editor](https://github.com/mybb/mybb/blob/mybb_1836/install/resources/settings.xml#L2087-L2094)_: _Off_. Similarly, individual MyBB forum users are able to disable the visual editor by diabling the account option (_User CP → Your Profile → Edit Options_) _Show the MyCode formatting options on the posting pages_.
Source: GitHub, Inc.
Max CVSS
7.5
EPSS Score
0.05%
Published
2023-11-06
Updated
2024-02-29
Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.
Source: MITRE
Max CVSS
5.4
EPSS Score
0.04%
Published
2023-11-06
Updated
2023-11-14
MyBB before 1.8.36 allows Code Injection by users with certain high privileges. Templates in Admin CP intentionally use eval, and there was some validation of the input to eval, but type juggling interfered with this when using PCRE within PHP.
Source: MITRE
Max CVSS
7.2
EPSS Score
0.09%
Published
2023-08-29
Updated
2023-09-11
In MyBB before 1.8.34, there is XSS in the User CP module via the user email field.
Source: MITRE
Max CVSS
6.1
EPSS Score
0.07%
Published
2023-05-22
Updated
2023-05-27
MyBB before 1.8.33 allows Directory Traversal. The Admin CP Languages module allows remote authenticated users, with high privileges, to achieve local file inclusion and execution.
Source: MITRE
Max CVSS
7.2
EPSS Score
0.17%
Published
2023-01-03
Updated
2023-01-10
MyBB 1.8.31 has a SQL injection vulnerability in the Admin CP's Users module allows remote authenticated users to modify the query string via direct user input or stored search filter settings.
Source: MITRE
Max CVSS
4.9
EPSS Score
0.07%
Published
2022-11-22
Updated
2022-11-22
MyBB 1.8.31 has a (issue 2 of 2) cross-site scripting (XSS) vulnerabilities in the post Attachments interface allow attackers to inject HTML by persuading the user to upload a file with specially crafted name
Source: MITRE
Max CVSS
6.1
EPSS Score
0.08%
Published
2022-11-22
Updated
2022-11-22
MyBB 1.8.31 has a Cross-site scripting (XSS) vulnerability in the visual MyCode editor (SCEditor) allows remote attackers to inject HTML via user input or stored data
Source: MITRE
Max CVSS
6.1
EPSS Score
0.10%
Published
2022-11-22
Updated
2022-11-22
MyBB is a free and open source forum software. The _Mail Settings_ ? Additional Parameters for PHP's mail() function mail_parameters setting value, in connection with the configured mail program's options and behavior, may allow access to sensitive information and Remote Code Execution (RCE). The vulnerable module requires Admin CP access with the `_Can manage settings?_` permission and may depend on configured file permissions. MyBB 1.8.31 resolves this issue with the commit `0cd318136a`. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: GitHub, Inc.
Max CVSS
7.2
EPSS Score
0.48%
Published
2022-10-06
Updated
2023-03-01

CVE-2022-24734

Public exploit
MyBB is a free and open source forum software. In affected versions the Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type `php` with PHP code, executed on on _Change Settings_ pages. This results in a Remote Code Execution (RCE) vulnerability. The vulnerable module requires Admin CP access with the `Can manage settings?` permission. MyBB's Settings module, which allows administrators to add, edit, and delete non-default settings, stores setting data in an options code string ($options_code; mybb_settings.optionscode database column) that identifies the setting type and its options, separated by a new line character (\n). In MyBB 1.2.0, support for setting type php was added, for which the remaining part of the options code is PHP code executed on Change Settings pages (reserved for plugins and internal use). MyBB 1.8.30 resolves this issue. There are no known workarounds.
Source: GitHub, Inc.
Max CVSS
7.2
EPSS Score
25.94%
Published
2022-03-09
Updated
2022-09-30
MyBB before 1.8.29 allows Remote Code Injection by an admin with the "Can manage settings?" permission. The Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type "php" with PHP code, executed on Change Settings pages.
Source: MITRE
Max CVSS
7.2
EPSS Score
0.18%
Published
2021-11-04
Updated
2021-11-05
MyBB before 1.8.28 allows stored XSS because the displayed Template Name value in the Admin CP's theme management is not escaped properly.
Source: MITRE
Max CVSS
5.4
EPSS Score
0.05%
Published
2021-10-26
Updated
2021-10-28
Cross-site Scripting vulnerability in MyBB before 1.8.26 via Custom moderator tools.
Source: MITRE
Max CVSS
6.1
EPSS Score
0.08%
Published
2021-03-15
Updated
2021-03-16
SQL Injection vulnerability in MyBB before 1.8.26 via User Groups. (issue 3 of 3).
Source: MITRE
Max CVSS
7.2
EPSS Score
0.09%
Published
2021-03-15
Updated
2021-03-16
SQL Injection vulnerability in MyBB before 1.8.26 via the Copy Forum feature in Forum Management. (issue 2 of 3).
Source: MITRE
Max CVSS
7.2
EPSS Score
0.09%
Published
2021-03-15
Updated
2021-03-16
SQL Injection vulnerability in MyBB before 1.8.26 via poll vote count. (issue 1 of 3).
Source: MITRE
Max CVSS
8.8
EPSS Score
0.16%
Published
2021-03-15
Updated
2021-03-23
SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files.
Source: MITRE
Max CVSS
8.8
EPSS Score
0.24%
Published
2021-03-15
Updated
2021-09-21
Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
Source: MITRE
Max CVSS
6.1
EPSS Score
0.20%
Published
2021-03-15
Updated
2021-09-21
MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).
Source: MITRE
Max CVSS
5.4
EPSS Score
0.06%
Published
2021-02-22
Updated
2021-02-26
Installer RCE on settings file write in MyBB before 1.8.22.
Source: MITRE
Max CVSS
9.8
EPSS Score
0.09%
Published
2023-09-01
Updated
2023-09-07
Cross Site Scripting (XSS) in MyBB v1.8.20 allows remote attackers to inject arbitrary web script or HTML via the "Description" field found in the "Add New Forum" page by doing an authenticated POST HTTP request to '/Upload/admin/index.php?module=forum-management&action=add'.
Source: MITRE
Max CVSS
5.4
EPSS Score
0.07%
Published
2021-08-31
Updated
2021-09-07
Cross Site Scripting (XSS) in MyBB v1.8.20 allows remote attackers to inject arbitrary web script or HTML via the "Title" field found in the "Add New Forum" page by doing an authenticated POST HTTP request to '/Upload/admin/index.php?module=forum-management&action=add'.
Source: MITRE
Max CVSS
5.4
EPSS Score
0.07%
Published
2021-08-31
Updated
2021-09-09
In MyBB before version 1.8.24, the custom MyCode (BBCode) for the visual editor doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. The weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as a post or Private Message) and operates on a maliciously crafted MyCode message. This may occur on pages where message content is pre-filled using a GET/POST parameter, or on reply pages where a previously saved malicious message is quoted. After upgrading MyBB to 1.8.24, make sure to update the version attribute in the `codebuttons` template for non-default themes to serve the latest version of the patched `jscripts/bbcodes_sceditor.js` file.
Source: GitHub, Inc.
Max CVSS
8.8
EPSS Score
0.08%
Published
2020-08-10
Updated
2020-08-13
124 vulnerabilities found
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