Home/CVE/MyBB 1.8.32 contains a chained vulnerability that allows authenticated administrators to bypass avatar upload restrictio
CVE

CVE-2023-53979

MyBB 1.8.32 contains a chained vulnerability that allows authenticated administrators to bypass avatar upload restrictio

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.

HIGH · CVSS 8.8 EPSS 0.00136
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
▤

Affected Products & Versions

1
mybball versions
⚠

Public Exploits & PoCs

3
pocfdlucifer.github.io · mybb1-8-32-LFI-RCEfdlucifer.github.io
pocwww.exploit-db.com · 51213www.exploit-db.com
pocwww.vulncheck.com · mybb-authenticated-remote-code-execution-via-chained-vuln...www.vulncheck.com
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · disclosure@vulncheck.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Dec 2025 · 10:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://mybb.com/Product
https://www.cve.org/CVERecord?id=CVE-2022-45867
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