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CWE

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CVE-2023-53979

Published: Dec 22, 2025

Modified: Mar 5, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

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.

Vendor	Product	Versions
Mybb	MyBB	affected `MyBB 1.8.32`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

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