Unrated severityNVD Advisory· Published Dec 22, 2025· Updated Mar 5, 2026
MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities
CVE-2023-53979
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.
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Affected products
1Patches
Vulnerability mechanics
References
4- www.exploit-db.com/exploits/51213mitreexploit
- www.vulncheck.com/advisories/mybb-authenticated-remote-code-execution-via-chained-vulnerabilitiesmitrethird-party-advisory
- fdlucifer.github.io/2023/01/17/mybb1-8-32-LFI-RCE/mitretechnical-description
- mybb.commitreproduct
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