High · published February 7, 2026
⚡ An authorization slip-up in WeKan’s attachment upload API allows attackers to mix and match identifiers like a jigsaw puzzle with missing pieces! 🧩 Think of it like a restaurant where customers can order dishes without verifying their table number. Without proper checks, anyone could claim to grab a meal meant for someone else, leading to a confusing mix of orders and unhappy diners. This vulnerability could let an attacker upload attachments to the wrong cards or boards, potentially exposing sensitive data or creating chaos in project management. A mismatched board relationship may lead to unauthorized access to content you thought was securely locked away!
Think of it like a restaurant where customers can order dishes without verifying their table number. Without proper checks, anyone could claim to grab a meal meant for someone else, leading to a confusing mix of orders and unhappy diners. In WeKan versions prior to 8.19, the attachment upload API fails to validate that the provided identifiers (like boardId and cardId) correspond to coherent relationships, allowing for unauthorized attachment uploads.
This vulnerability could let an attacker upload attachments to the wrong cards or boards, potentially exposing sensitive data or creating chaos in project management. A mismatched board relationship may lead to unauthorized access to content you thought was securely locked away! Upgrade WeKan to version 8.19 or later to close this security hole, ensuring the API performs consistent validations on all identifiers used in attachment uploads. Additionally, review your current implementations for any unauthorized access that may have arisen from this issue. You've got this! Follow these steps, and you'll have your WeKan environment secured in no time! 🛡️