CVE-2025-9094 in ThingsBoard
Summary
by MITRE • 08/18/2025
A vulnerability was detected in ThingsBoard 4.1. This vulnerability affects unknown code of the component Add Gateway Handler. The manipulation leads to improper neutralization of special elements used in a template engine. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor replies, that "[t]he fix will come within upcoming release (v4.2) and will be inherited by maintenance releases of LTS versions (starting 4.0)."
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 12/03/2025
CVE-2025-9094 represents a critical template injection vulnerability within the ThingsBoard 4.1 platform, specifically within the Add Gateway Handler component. This vulnerability stems from inadequate sanitization of user input when processing template engine elements, creating a pathway for malicious actors to manipulate the system's template handling mechanisms. The flaw resides in the improper neutralization of special characters and elements that are typically used in template engines, allowing attackers to inject arbitrary code or manipulate template rendering processes. The vulnerability's remote exploitability means that attackers can leverage this weakness from external networks without requiring physical access or local system privileges, making it particularly dangerous in networked environments where ThingsBoard serves as a gateway for IoT device management and data processing.
The technical implications of this vulnerability extend beyond simple code injection, as it can potentially enable attackers to execute arbitrary commands on the affected system, access sensitive data, or compromise the integrity of the entire ThingsBoard platform. The template engine manipulation allows for bypassing intended security controls and can lead to privilege escalation or lateral movement within the network. This vulnerability aligns with CWE-74, which describes improper neutralization of special elements used in a template engine, and represents a significant risk to organizations relying on ThingsBoard for industrial IoT deployments. The fact that this vulnerability has been publicly disclosed and is known to be exploitable increases the urgency for immediate remediation, as threat actors may already be leveraging this weakness in active attacks against vulnerable systems.
Organizations utilizing ThingsBoard 4.1 should immediately implement mitigations while awaiting the official vendor patch scheduled for release in version 4.2. The recommended approach involves restricting network access to the affected components, implementing network segmentation, and monitoring for suspicious template processing activities. Security teams should also consider disabling unnecessary gateway handler functionality until the official patch is applied, as this reduces the attack surface. The vendor's response indicates that the fix will be incorporated into the upcoming v4.2 release and will be backported to LTS versions starting from 4.0, which suggests that the patch will address the root cause through proper input validation and template sanitization mechanisms. However, organizations cannot rely solely on the vendor's timeline and should implement temporary compensating controls to protect against active exploitation attempts, particularly in environments where IoT gateways and device management systems are critical infrastructure components.
The broader implications of this vulnerability highlight the importance of secure template handling in IoT platforms and the need for comprehensive input validation across all components that process user-supplied data. This flaw demonstrates how seemingly minor issues in template processing can create significant security risks in complex systems, particularly those managing sensitive industrial data and device communications. Organizations should conduct thorough vulnerability assessments of their IoT infrastructure and review similar template handling mechanisms across their technology stack to identify and remediate potential similar vulnerabilities. The vulnerability also reinforces the necessity of maintaining up-to-date security practices and implementing robust patch management processes, especially for critical infrastructure components that serve as gateways for industrial IoT deployments and may be targeted by sophisticated threat actors.