| 标题 | Selleo Labs Sp. z o.o. Mentingo learn-v2025.08.27 File Upload Restriction Bypass |
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| 描述 | Vulnerability Type: File Upload Restriction Bypass
CWE Classification: CWE-434 (Unrestricted Upload of File with Dangerous Type)
Attack Vector: HTTP Header Manipulation
Affected Components: User Avatar Upload, Course Image Upload
Required Privileges: Student (lowest privilege level)
Description
A critical file upload restriction bypass vulnerability in Mentingo's image upload functionality allows attackers to upload arbitrary file types by manipulating HTTP Content-Type headers. The vulnerability affects both user avatar and course image upload features, enabling unauthorized file storage with zero content validation.
Key Security Failure: The application performs only client-supplied MIME type validation, completely bypassing file content inspection, signature verification, or extension validation.
Critical Impact: Infrastructure Weaponization
This vulnerability enables weaponization of trusted educational infrastructure for malicious campaigns, creating severe downstream security risks:
Trusted Domain Exploitation
Malware Hosting on Educational Infrastructure: Attackers leverage legitimate educational platform domains to host and distribute malicious content
Corporate Firewall Bypass: Educational domains are commonly whitelisted by enterprise security solutions
Anti-virus Evasion: Security tools often maintain reduced scrutiny for educational platform domains
Enhanced Social Engineering: Victims exhibit significantly higher trust levels toward content served from educational institutions
Attack Chain Amplification
Phishing Campaign Enhancement: Malicious URLs appear to originate from legitimate educational platforms
Supply Chain Positioning: Uploaded malware can target educational sector users with elevated trust assumptions
Persistent Threat Hosting: Files remain accessible via presigned URLs for extended periods
Cross-Organizational Impact: Single compromised Mentingo instance affects trust ecosystem across multiple educational organizations
Exploitation Requirements
Technical Skill Level: Minimal (basic HTTP request manipulation)
Access Requirements: Standard student account registration
This vulnerability transforms Mentingo deployments into potential command and control infrastructure for threat actors, significantly amplifying the attack surface beyond the immediate application scope. |
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| 来源 | ⚠️ https://gist.github.com/KhanMarshaI/7a2e74fcb194f7d6ee7e60da4a14af7b |
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| 用户 | KhanMarshal (UID 89610) |
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| 提交 | 2025-09-01 13時39分 (1 年前) |
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| 管理 | 2025-09-20 08時20分 (19 days later) |
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| 状态 | 已接受 |
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| VulDB条目 | 325069 [Selleo Mentingo 2025.08.27 Content-Type userAvatar 权限提升] |
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| 积分 | 20 |
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