CVE-2023-53979
MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities
- State
- Published
- Severity
- 8.6 High
- Published
- Dec 22, 2025
- Updated
- Mar 5, 2026
- Reserved
- Dec 20, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
MyBBMybb |
|
References
- ExploitDB-51213exploit
- Official MyBB Vendor Homepageproduct
- Researcher Disclosuretechnical-description
- VulnCheck Advisory: MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilitiesthird-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2022-45867
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