CVE-2023-53979

MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities

Published Dec 22, 2025 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:mybb:mybb:1.4.3:*:*:*:*:*:*:*
Type Values Removed Values Added
CPEs cpe:2.3:a:mybb:mybb:1.8.32:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Mybb
Mybb mybb
Vendors & Products Mybb
Mybb mybb
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Mar 5, 2026, 12:03 PM
Reserved
Dec 20, 2025, 4:31 PM
Status
Modified
Published
Dec 22, 2025, 10:16 PM
Modified
Jun 17, 2026, 6:46 AM