CVE-2023-53979

Published: Dec 22, 2025Modified: Jun 17, 2026

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

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 (1)

Products: Mybb: Mybb

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Mybb Mybb	Version 1.8.32

Related CWEs

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

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (5)

https://fdlucifer.github.io/2023/01/17/mybb1-8-32-LFI-RCE/

Source: disclosure@vulncheck.com

ExploitThird Party Advisory

https://mybb.com/

Source: disclosure@vulncheck.com

Product

https://www.exploit-db.com/exploits/51213

Source: disclosure@vulncheck.com

Exploit

https://www.vulncheck.com/advisories/mybb-authenticated-remote-code-execution-via-chained-vulnerabilities

Source: disclosure@vulncheck.com

ExploitThird Party Advisory

https://www.cve.org/CVERecord?id=CVE-2022-45867

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.