CVE-2022-4111 is a vulnerability identified in the open-source low-code platform tooljet/tooljet, specifically affecting versions prior to 1.27. The issue arises from improper validation of the specified quantity in user input, classified under CWE-1284. In this case, the vulnerability allows authenticated users to upload profile pictures exceeding the intended size limit of 2MB. The lack of an enforced file size restriction means that an attacker can upload excessively large files, which can exhaust server resources such as memory, disk space, or processing capacity. This can lead to a Denial of Service (DoS) condition, where legitimate users may experience degraded performance or complete unavailability of the application. Since the vulnerability requires the attacker to be logged in, it is not exploitable by unauthenticated users, which somewhat limits the attack surface. However, given that many organizations use tooljet for internal or external application development and deployment, the impact of service disruption can be significant. No known exploits have been reported in the wild, and no official patches or updates have been linked in the provided information, though it is expected that the vendor would address this in subsequent releases. The vulnerability is medium severity, reflecting the moderate impact and the requirement for authentication. The root cause is the failure to properly validate and enforce file size limits on user-uploaded content, a common input validation flaw that can be mitigated by strict server-side checks.

For European organizations utilizing tooljet, this vulnerability poses a risk primarily to service availability. An attacker with valid credentials could intentionally upload large profile images to consume server resources, potentially causing application slowdowns or outages. This could disrupt business operations, especially for organizations relying on tooljet for critical internal tools or customer-facing applications. The confidentiality and integrity of data are not directly impacted by this vulnerability, as it does not involve unauthorized access or data manipulation. However, the resulting DoS could indirectly affect operational continuity and user trust. Organizations in sectors with high availability requirements, such as finance, healthcare, and public administration, could face significant operational challenges if exploited. Additionally, the requirement for authentication means insider threats or compromised accounts could be leveraged to exploit this vulnerability. Given the increasing adoption of low-code platforms in Europe, the risk is non-negligible, particularly in environments where user account management and monitoring are lax.

To mitigate this vulnerability, European organizations should implement strict server-side validation of file uploads, enforcing a maximum file size limit of 2MB or less as appropriate. This validation must be performed regardless of any client-side checks to prevent bypass. Organizations should also monitor and audit user uploads for anomalous file sizes or patterns indicative of abuse. Implementing rate limiting on upload endpoints can reduce the risk of resource exhaustion from repeated large file uploads. Additionally, enforcing strong authentication and session management policies will reduce the risk of compromised accounts being used to exploit this vulnerability. Organizations should track updates from the tooljet vendor and apply patches promptly once available. As an immediate workaround, disabling profile picture uploads or restricting this feature to trusted users can reduce exposure. Finally, maintaining robust resource monitoring and alerting on server performance metrics can help detect and respond to potential DoS attempts early.