CVE-2023-53979

HIGH 8.8

MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	mybb
Product	mybb
Published	Dec 22, 2025
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

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

Affected Versions

Mybb / MyBB

MyBB 1.8.32

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

lUc1f3r11