CVE-2025-3565: Huanfenz StudentManager RCE Vulnerability

CVE-2025-3565 Overview

CVE-2025-3565 is an unrestricted file upload vulnerability in huanfenz StudentManager 1.0. The flaw exists in the /upload/uploadArticle.do endpoint within the Announcement Management Section. Manipulation of the File parameter allows attackers to upload arbitrary file types to the server. The vulnerability requires high privileges but can be triggered remotely over the network. The exploit has been publicly disclosed, increasing the risk of opportunistic abuse. The vendor was contacted prior to disclosure but did not respond, leaving the product without an official patch. The weakness is categorized under [CWE-434] Unrestricted Upload of File with Dangerous Type and [CWE-284] Improper Access Control.

Critical Impact
Authenticated attackers can upload arbitrary files to the StudentManager server via the announcement upload handler, potentially enabling further compromise of confidentiality, integrity, and availability.

Affected Products

huanfenz StudentManager 1.0
Component: Announcement Management Section
Endpoint: /upload/uploadArticle.do

Discovery Timeline

2025-04-14 - CVE-2025-3565 published to NVD
2025-05-21 - Last updated in NVD database

Technical Details for CVE-2025-3565

Vulnerability Analysis

The vulnerability resides in the announcement upload handler at /upload/uploadArticle.do. The handler accepts a File parameter without enforcing restrictions on file type, extension, or content. An authenticated user with sufficient privileges can submit a crafted multipart request and place arbitrary files into a server-controlled location.

Because the application does not validate the uploaded artifact, attackers can stage payloads that compromise the limited confidentiality, integrity, and availability of the application. The vendor did not respond to disclosure attempts, so no official remediation is available.

Root Cause

The root cause is missing validation logic in the upload routine handling announcement attachments. The code does not enforce an allow-list of permitted MIME types or extensions, nor does it apply access-control checks consistent with the sensitivity of the operation [CWE-434, CWE-284]. Filenames and content types supplied by the client are accepted as-is.

Attack Vector

An attacker authenticated to StudentManager sends a crafted HTTP POST request to /upload/uploadArticle.do with a malicious payload in the File field. The endpoint writes the file to disk without filtering. The attack is network-reachable, requires no user interaction, and the public disclosure includes reproduction details. Refer to the GitHub Vulnerability Report and VulDB entry #304606 for technical specifics.

Detection Methods for CVE-2025-3565

Indicators of Compromise

HTTP POST requests to /upload/uploadArticle.do containing non-standard file extensions in the File parameter.
Unexpected files written to the StudentManager announcement upload directory.
Outbound connections originating from the StudentManager application process to unfamiliar hosts after upload activity.

Detection Strategies

Inspect web server access logs for requests to /upload/uploadArticle.do and correlate with the authenticated user identity and source IP.
Monitor the upload directory for newly created files whose extensions or magic bytes do not match expected document formats.
Apply file integrity monitoring on the StudentManager web root to detect unauthorized additions.

Monitoring Recommendations

Forward web server and application logs to a centralized log platform for correlation with authentication events.
Alert on multipart POSTs to the upload endpoint that exceed normal size baselines or contain executable content signatures.
Track repeat access patterns from a single account to /upload/uploadArticle.do outside normal business hours.

How to Mitigate CVE-2025-3565

Immediate Actions Required

Restrict network access to StudentManager 1.0 to trusted internal users only until a patch is available.
Revoke or tightly scope accounts with announcement-management privileges to reduce the population able to trigger the upload.
Place the application behind a web application firewall configured to filter upload requests to /upload/uploadArticle.do.

Patch Information

No vendor patch is available. The vendor did not respond to the disclosure. Organizations running huanfenz StudentManager 1.0 should evaluate whether continued use is acceptable and consider migrating to a maintained alternative. Monitor the VulDB entry for any updates.

Workarounds

Disable the announcement upload functionality at the web server level by blocking POST requests to /upload/uploadArticle.do.
Enforce server-side allow-list validation of uploaded file extensions and MIME types through a reverse proxy filter.
Store uploaded files outside the web-accessible directory and serve them through a controlled handler that prevents direct execution.

bash

# Example nginx rule to block the vulnerable endpoint
location = /upload/uploadArticle.do {
    return 403;
}