CVE-2023-53979

MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities

HIGH
8.8
CVSS Score
Published: December 22, 2025 at 09:35 PM UTC
Updated: June 17, 2026 at 06:46 AM UTC
1 product affected across 1 vendorMybb

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Severity
HIGH8.8
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Product
Source: cverecord
https://mybb.com/
Technical DescriptionExploitThird Party Advisory
Source: cverecord
https://fdlucifer.github.io/2023/01/17/mybb1-8-32-LFI-RCE/
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.cve.org/CVERecord?id=CVE-2022-45867

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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