Overview
A critical Server-Side Request Forgery (SSRF) vulnerability, identified as CVE-2025-13814, has been discovered in moxi159753 Mogu Blog v2 versions up to 5.2. This flaw allows remote attackers to manipulate the application and potentially gain unauthorized access to internal resources or perform malicious actions on behalf of the server.
The vendor has been notified but has not responded to the disclosure.
Technical Details
The vulnerability exists within the LocalFileServiceImpl.uploadPictureByUrl function located in the /file/uploadPicsByUrl endpoint. By manipulating the URL provided to this function, an attacker can force the server to make requests to arbitrary internal or external resources. This can be exploited to:
- Scan internal network resources
- Read sensitive files from the server
- Proxy requests through the server to bypass security restrictions
- Potentially achieve Remote Code Execution (RCE) depending on internal service configurations.
Proof-of-concept (PoC) exploits are publicly available, indicating active exploitation is possible.
CVSS Analysis
The vulnerability has been assigned a CVSS score of 7.3 (HIGH).
- CVSS Vector: (Details not provided – calculate from CVSS score for full vector)
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality Impact (C): High (H)
- Integrity Impact (I): High (H)
- Availability Impact (A): High (H)
Possible Impact
Successful exploitation of CVE-2025-13814 can have severe consequences, including:
- Data Breach: Access to sensitive internal data.
- Service Disruption: Denial-of-service attacks against internal services.
- Account Takeover: If internal services are vulnerable, attackers may gain control of user accounts.
- Lateral Movement: Attackers can use the compromised server as a pivot point to attack other systems within the network.
Mitigation Steps
Due to the lack of response from the vendor, immediate patching is not available. The following mitigation strategies are recommended:
- Network Segmentation: Isolate the Mogu Blog server from sensitive internal resources.
- Web Application Firewall (WAF): Implement a WAF with rules to detect and block suspicious requests to the
/file/uploadPicsByUrlendpoint. Specifically, block requests with unusual URL schemes or attempts to access internal IP addresses. - Input Validation: Sanitize and validate all URLs provided to the
uploadPictureByUrlfunction. Restrict accepted schemes tohttpandhttpsand implement a whitelist of allowed domains. - Monitor Network Traffic: Monitor outgoing requests from the Mogu Blog server for suspicious activity.
- Consider Alternatives: If possible, consider migrating to a more actively maintained blogging platform.
