CVE-2025-9800 in sim
Summary
by MITRE • 09/02/2025
A weakness has been identified in SimStudioAI sim up to ed9b9ad83f1a7c61f4392787fb51837d34eeb0af. Affected by this issue is the function Import of the file apps/sim/app/api/files/upload/route.ts of the component HTML File Parser. Executing manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The exploit has been made available to the public and could be exploited. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. This patch is called 45372aece5e05e04b417442417416a52e90ba174. A patch should be applied to remediate this issue.
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Analysis
by VulDB Data Team • 11/15/2025
The vulnerability identified as CVE-2025-9800 represents a critical security flaw within the SimStudioAI simulation platform, specifically affecting the HTML File Parser component. This weakness manifests in the Import function located within the file apps/sim/app/api/files/upload/route.ts, where improper validation of file upload parameters creates an unrestricted upload condition. The vulnerability's impact is particularly severe because it allows remote attackers to execute malicious file uploads without adequate authorization or validation checks, potentially enabling arbitrary code execution and system compromise. The affected system operates on a rolling release model, which complicates traditional version-based vulnerability assessment and requires immediate patch application regardless of specific release versions. The exploit availability for this vulnerability significantly elevates the risk level, as malicious actors can readily leverage the identified weakness for unauthorized access and system manipulation.
The technical implementation of this vulnerability stems from inadequate input validation within the HTML File Parser's upload functionality, creating a path for attackers to bypass security controls designed to restrict file types and content. This flaw aligns with CWE-434, which specifically addresses the issue of unrestricted upload of file with dangerous type, where the system fails to properly validate or sanitize file content before processing. The vulnerability's remote exploitability means that attackers can initiate malicious uploads from external systems without requiring physical access or local privileges, making it particularly dangerous in networked environments. The lack of version information in the rolling release model indicates that the vulnerability exists across multiple active versions simultaneously, requiring immediate remediation across all affected instances.
The operational impact of CVE-2025-9800 extends beyond simple unauthorized file uploads, potentially enabling attackers to execute arbitrary code, establish persistent backdoors, or gain elevated system privileges within the affected environment. This vulnerability directly violates the principle of least privilege and can lead to complete system compromise when exploited successfully. The unrestricted upload capability allows attackers to deploy malicious scripts, binaries, or configuration files that can persist across system reboots and remain undetected by standard security monitoring systems. Organizations utilizing SimStudioAI in production environments face significant risk of data breaches, service disruption, and potential regulatory compliance violations. The rolling release nature of the platform means that this vulnerability affects all active deployments simultaneously, creating a widespread security exposure that requires immediate attention across all operational instances.
Mitigation strategies for CVE-2025-9800 must prioritize immediate patch application using the provided remediation hash 45372aece5e05e04b417442417416a52e90ba174, which represents the specific code changes required to address the unrestricted upload vulnerability. Security teams should implement comprehensive file validation mechanisms that enforce strict content type checking, file size limitations, and malicious content scanning before processing any uploaded files. The patch should be applied across all active instances immediately, with thorough testing to ensure compatibility with existing functionality. Additionally, organizations should consider implementing network-based controls such as web application firewalls and upload restrictions to provide additional layers of protection. Regular security assessments and monitoring should be conducted to detect any potential exploitation attempts, while incident response procedures should be updated to address potential compromise scenarios. The vulnerability's classification under ATT&CK technique T1195.001 for "Unrestricted Upload of File with Dangerous Type" emphasizes the need for robust file validation and content inspection mechanisms to prevent successful exploitation attempts.