HTTP: MyBB Admin Control Panel Code Injection

This signature detects attempts to exploit a known vulnerability against MyBB application. A successful attack can lead to arbitrary code execution.

Extended Description

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.

Affected Products

Mybb mybb

References

CVE: CVE-2022-24734

Short Name

HTTP:CTS:MYBB-ADMIN-CP-CODE-INJ

Severity

Major

Recommended

False

Recommended Action

Drop

HTTP: MyBB Admin Control Panel Code Injection

Extended Description

Affected Products

References

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