Beware of File Upload Vulnerability in Pimcore Open Source Platform

CVSScvssV3_1: 8.2

Pimcore is a popular open source data and experience management platform used by many websites and applications. Researchers discovered a vulnerability in its user profile update functionality that could allow attackers to bypass security checks.

The issue occurs because Pimcore does not properly validate the file content-type during uploads. Attackers can take advantage of this by adding a valid file signature like GIF and disguising invalid file types. This would let them upload HTML files containing malicious JavaScript code.

If exploited, this could allow attackers to execute arbitrary code on websites built with Pimcore. The JavaScript would run with the same privileges as the vulnerable website, potentially compromising user accounts or stealing sensitive data.

The good news is that Pimcore has released an update patching this vulnerability. Version 10.5.16 fixes the improper content-type validation. All Pimcore users are advised to update immediately.

To stay protected, always keep your software up-to-date. Configure file upload security carefully to block unauthorized file types. Monitor your websites for any unusual activity. Taking basic precautions can help prevent many common attacks targeting outdated or misconfigured systems.