Vulnerability · Published Dec 22, 2025 · Assigned by VulnCheck
CVE-2023-53979MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities
High 8.8
In plain English
A high-severity path traversal in MyBB from Mybb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-51213 exploit
- Official MyBB Vendor Homepage product
- Researcher Disclosure technical-description
- VulnCheck Advisory: MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2022-45867