GHSA-P279-5WCV-45VQ Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution

Summary The MediaBundle blocks dangerous upload extensions with a blacklist that was matched case-sensitively, while the stored filename was lowercased afterwards. A file uploaded as webshell.pHp therefore bypassed the blacklist and was written to the web-accessible upload directory as...

Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution

Summary The MediaBundle blocks dangerous upload extensions with a blacklist that was matched case-sensitively, while the stored filename was lowercased afterwards. A file uploaded as webshell.pHp therefore bypassed the blacklist and was written to the web-accessible upload directory as...

EUVD-2026-92446

Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution...

CVE-2026-104890

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 blacklistedextensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An...

CVE-2026-104890 Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution

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 blacklistedextensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An...

CVE-2026-104890

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 blacklistedextensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An...

CVE-2026-104890 Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution

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 blacklistedextensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An...

CVE-2026-104890

Kunstmaan CMS , a Symfony-based content management system, contains a blacklist bypass vulnerability in the MediaBundle extension (specifically in src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php). Prior to version 7.3.2 , the FileHandler::getFilePath function performs a case-sensitive check...

CVE-2026-104890 Kunstmaan CMS: MediaBundle extension blacklist bypass allows authenticated administrators to upload executable PHP files leading to remote code execution

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 blacklistedextensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An...

CVE-2026-104890: Unrestricted Upload of File with Dangerous Type

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 blacklistedextensions check case-sensitively in FileHandler::getFilePath and lowercases the stored extension afterward. An...

PT-2026-106005

Name of the Vulnerable Software and Affected Versions Kunstmaan CMS versions prior to 7.3.2 Description An issue exists in the FileHandler::getFilePath function within src/Kunstmaan/MediaBundle/Helper/File/FileHandler.php where the blacklisted extensions check is performed case-sensitively. Becau...

Kunstmaan CMS Open Redirect

Affected software: kunstmaan cms Type of vulnerability: redirect vulnerability URL: bundles.kunstmaan.be Discovered by: Provensec Website: http://www.provensec.com version: not specified on domain Proof of concept http://demo.bundles.kunstmaan.be/en/admin/media/delete/9?redirectUrl=http://google....