CVE-2023-53979— MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities
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I. Basic Information for CVE-2023-53979
Vulnerability Information
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Vulnerability Title
MyBB 1.8.32 Authenticated Remote Code Execution via Chained Vulnerabilities
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
MyBB 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MyBB（MyBulletinBoard）是MyBB团队的一套用PHP和MySQL开发的免费且基于Web的论坛软件。该软件具有简单易用、支持多国语言、可扩展等特点。 MyBB 1.8.32版本存在路径遍历漏洞，该漏洞源于允许经过身份验证的管理员绕过头像上传限制并执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-53979
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mybb · 2025-12-22 · 4 CVEs total
| CVE-2023-53976 | 5.4 MEDIUM | myBB Forums 1.8.26 Stored Cross-Site Scripting via Template Management |
| CVE-2023-53977 | 5.4 MEDIUM | myBB Forums 1.8.26 Stored Cross-Site Scripting via Forum Management |
| CVE-2023-53978 | 5.4 MEDIUM | myBB Forums 1.8.26 Stored Cross-Site Scripting via Forum Announcements |
IV. Related Vulnerabilities
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MyBB may disclosure unviewable threads' titles in searches - CVE-2025-48940
MyBB's upgrade component vulnerable to local file inclusion - CVE-2024-23335
Backups directory .htaccess deletion in. MyBB - CVE-2024-23336
Incomplete disallowed remote addresses list in MyBB - CVE-2023-46251
Visual editor persistent Cross-site Scripting (XSS) in MyBB
Same vendor: Mybb
- CVE-2018-25309
MyBB Recent threads 17.0 Persistent Cross-Site Scripting - CVE-2018-25250
MyBB Last User's Threads in Profile Plugin 1.2 Persistent XS - CVE-2018-25249
MyBB My Arcade Plugin 1.3 Persistent XSS via Comment - CVE-2018-25248
MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php - CVE-2018-25247
MyBB Like Plugin 3.0.0 Cross-Site Scripting via User Profile
Same weakness: CWE-22
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V. Comments for CVE-2023-53979
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