CyberRota Analysis
AI-GeneratedKunstmaan CMS versions prior to 7.3.2 are vulnerable to a file upload issue that allows authenticated backend users to bypass the extension blacklist by uploading files with mixed-case executable extensions, such as PHP. This can lead to arbitrary code execution if the web server processes these files, posing a significant risk to the integrity and security of the application. Organizations using Kunstmaan CMS should prioritize updating to version 7.3.2 or later to mitigate this high-severity vulnerability.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
Kunstmaan CMS is an open source content management system based on the Symfony framework. Prior to 7.3.2, src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php performs the blacklisted_extensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An authenticated backend user with media access can upload a mixed-case executable extension such as PHP that bypasses the check and is stored in the web-accessible media directory with an executable lowercase extension. The default blacklist also omits several server-executable extension types, allowing the same code-execution impact where the web server executes uploaded files. This issue is fixed in version 7.3.2.