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High · 8.8 CVE-2023-53979 EUVD-2023-60241GHSA-5639-746g-v626

MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities

Published Dec 22, 2025 · Updated Mar 5, 2026 · Assigned by VulnCheck

Description

MyBB 1.8.32 contains a chained vulnerability that allows authenticated administrators to bypass avatar upload restrictions and execute arbitrary code. Attackers can modify upload path settings, upload a malicious PHP-embedded image file, and execute commands through the language configuration editing interface.

Affected products

VendorProductAffectedFixed
Mybb MyBB MyBB 1.8.32 —

References