Overview
CVE-2025-13949 describes an unrestricted file upload vulnerability identified in ProudMuBai GoFilm versions 1.0.0 and 1.0.1. This vulnerability resides within the SingleUpload function of the /server/controller/FileController.go file. Successful exploitation allows remote attackers to upload arbitrary files to the server, potentially leading to code execution, data exfiltration, or denial-of-service attacks. The vulnerability is considered MEDIUM severity and has a CVSS score of 6.3. Unfortunately, the vendor was contacted regarding this issue but has not provided any response.
Technical Details
The vulnerability stems from insufficient validation of the File argument passed to the SingleUpload function. Specifically, the application fails to adequately check the file type, size, or content, allowing attackers to bypass intended security restrictions. By crafting a malicious file and sending it to the affected endpoint, an attacker can upload it to the server’s file system. The publicly available exploit demonstrates the ease with which this vulnerability can be leveraged.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) provides a standardized way to assess the severity of security vulnerabilities. CVE-2025-13949 has a CVSS score of 6.3 (MEDIUM). This score reflects the following factors:
- Attack Vector (AV): Network (N) – The vulnerability can be exploited remotely over a network.
- Attack Complexity (AC): Low (L) – The conditions for exploitation are easily met.
- Privileges Required (PR): None (N) – No privileges are required to exploit the vulnerability.
- User Interaction (UI): None (N) – No user interaction is required for exploitation.
- Scope (S): Unchanged (U) – An exploited vulnerability can only affect resources managed by the same security authority.
- Confidentiality Impact (C): Low (L)
- Integrity Impact (I): Low (L)
- Availability Impact (A): Low (L)
Possible Impact
The successful exploitation of CVE-2025-13949 can have several significant consequences:
- Remote Code Execution (RCE): Attackers can upload and execute malicious code on the server, potentially gaining complete control.
- Data Exfiltration: Attackers can upload scripts or backdoors to steal sensitive data stored on the server.
- Denial-of-Service (DoS): Attackers can upload large files to exhaust server resources, leading to service disruption.
- Website Defacement: Attackers can upload malicious files to replace legitimate website content.
Mitigation or Patch Steps
Unfortunately, due to the vendor’s lack of response, there is currently no official patch available. The following mitigation steps are recommended to reduce the risk of exploitation:
- Implement Strict File Validation: Thoroughly validate file types, sizes, and content before allowing uploads. Use a whitelist approach, only allowing specific, necessary file extensions.
- Sanitize File Names: Sanitize file names to prevent directory traversal attacks and other malicious manipulations.
- Limit File Sizes: Implement restrictions on the maximum file size that can be uploaded.
- Disable Direct Access to Uploaded Files: Configure the web server to prevent direct access to the directory where uploaded files are stored. Serve the files through a controlled script that performs further validation and sanitization.
- Web Application Firewall (WAF): Deploy a Web Application Firewall (WAF) to detect and block malicious upload attempts. Configure the WAF with rules to identify common file upload attack patterns.
- Monitor and Log: Implement robust monitoring and logging to detect suspicious file upload activity.
Important Note: Until an official patch is released, these mitigations are critical to protecting your systems from this vulnerability.
