CVE-2025-29287

Vulnerability

Overview

CVE-2025-29287 is an arbitrary file upload vulnerability affecting the ueditor component in MCMS v5.4.3, a Java-based content management system [2]. The issue allows an attacker to upload a maliciously crafted file during the editing process, which can then lead to remote code execution [1][3]. The root cause is insufficient validation of uploaded file types within the ueditor component [3].

Exploitation

An attacker can exploit this vulnerability by uploading a malicious file (e.g., a JSP webshell) through the editor's file upload functionality. No authentication is required, and the attack can be performed remotely over the network [2]. The vendor's official issue tracker confirms that this flaw exists in the 5.4.3 release [4].

Impact

Successful exploitation allows the attacker to execute arbitrary code on the server with the privileges of the web application, leading to full compromise of the MCMS instance [2]. This could result in data theft, website defacement, or use of the server for further attacks.

Mitigation

As of the publication date, users should apply any available patches from the vendor or restrict upload permissions to trusted users. The MCMS project is open source, and a fix may be available from the repository [1]. No workaround is documented, and the vulnerability is not yet listed on the CISA Known Exploited Vulnerabilities (KEV) catalog.