CVE-2021-43281

HighCVSS 7.2/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.2/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-94

Affected software

No affected versions have been published.

Timeline

Published: Nov 4, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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