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CVE-2023-53979

Date: December 22, 2025

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.

Severity Score

Related Resources (7)

https://fdlucifer.github.io/2023/01/17/mybb1-8-32-LFI-RCE/
https://www.cve.org/CVERecord?id=CVE-2022-45867
https://www.exploit-db.com/exploits/51213
https://mybb.com/
https://nvd.nist.gov/vuln/detail/CVE-2023-53979
https://www.vulncheck.com/advisories/mybb-authenticated-remote-code-execution-via-chained-vulnerabilities
https://www.mend.io/vulnerability-database/CVE-2023-53979

Severity Score

Weakness Type (CWE)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-22

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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