Insufficient File Type Validation in Nextcloud Contacts by Nextcloud

CVE-2020-8181

What is CVE-2020-8181?

A vulnerability in Nextcloud Contacts version 3.2.0 stems from a lack of proper file type validation, allowing attackers to upload arbitrary files as avatars. This oversight poses a risk, potentially leading to further exploitation. Malicious users could leverage this flaw to bypass security restrictions, increasing the chance of harmful file execution and data compromise. It is essential for users of Nextcloud Contacts to review the security advisory and update to mitigate such vulnerabilities.

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