CVE-2025-34282 in ThingsBoard
Summary
by MITRE • 10/17/2025
ThingsBoard versions < 4.2.1 contain a server-side request forgery (SSRF) vulnerability in the dashboard's Image Upload Gallery feature. An attacker can upload a malicious SVG file that references a remote URL. If the server processes the SVG file in a way that parses external references, it may initiate unintended outbound requests. This can be used to access internal services or resources.
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Analysis
by VulDB Data Team • 05/11/2026
The vulnerability identified as CVE-2025-34282 affects ThingsBoard versions prior to 4.2.1 and represents a critical server-side request forgery flaw within the dashboard's Image Upload Gallery functionality. This vulnerability stems from insufficient input validation and sanitization of uploaded SVG files, creating a pathway for malicious actors to exploit the system's processing mechanisms. The issue manifests when the platform accepts and processes SVG files that contain external resource references, potentially enabling unauthorized access to internal network resources through outbound requests initiated by the vulnerable system.
The technical exploitation of this vulnerability occurs through the manipulation of SVG file content to include external resource references such as http or https URLs within the image upload gallery feature. When the server processes these malicious SVG files, the parsing mechanism may inadvertently initiate outbound network requests to the referenced external URLs, effectively allowing attackers to probe internal services or access resources that should remain isolated from external networks. This behavior aligns with the common patterns of server-side request forgery attacks where the target system becomes an unwitting proxy for malicious network requests.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to map internal network topologies, access sensitive internal services, and potentially escalate privileges within the affected environment. The vulnerability's severity is amplified by the fact that SVG files are commonly used for image uploads and are often processed without the same level of security scrutiny applied to other file types. This SSRF vulnerability can be leveraged to access internal databases, web services, or other network resources that are not directly exposed to the internet, creating a significant attack surface expansion for organizations using vulnerable ThingsBoard installations.
Organizations utilizing affected ThingsBoard versions should implement immediate mitigations including the upgrade to version 4.2.1 or later, which contains the necessary patches to address this vulnerability. Additional protective measures include implementing strict file validation policies that reject SVG files containing external references, deploying network segmentation to isolate the ThingsBoard server from sensitive internal services, and configuring firewalls to restrict outbound requests from the vulnerable system. The vulnerability's classification aligns with CWE-918, which specifically addresses server-side request forgery vulnerabilities, and follows attack patterns documented in the ATT&CK framework under the T1190 technique for exploitation of remote services. Organizations should also consider implementing web application firewalls and monitoring for suspicious outbound network activity that could indicate exploitation attempts.