CVE-2026-54208 in TeamDavid
Summary
by MITRE • 08/07/2026
Tobit Laboratories AG TeamDavid's Webbox application is vulnerable to arbitrary file write, allowing an unauthenticated attacker to create or write into existing files on the server with attacker-controlled content. This is possible because user input is written directly to files without proper validation or restriction on file types. As a result, an attacker can create files (e.g., .htm), containing malicious JavaScript code. When a user accesses a file created in this way, stored cross-site scripting is triggered. This issue affects TeamDavid through Rollout 524.
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Analysis
by VulDB Data Team • 08/07/2026
The vulnerability in Tobit Laboratories AG TeamDavid's Webbox application represents a critical arbitrary file write flaw that enables unauthenticated attackers to compromise server integrity and execute malicious code within user contexts. This security weakness stems from insufficient input validation mechanisms that permit direct file writing operations without proper sanitization or access control measures. The vulnerability specifically affects the Rollout 524 version of TeamDavid's Webbox, indicating this issue has persisted through multiple releases and likely represents a fundamental architectural flaw in how user-supplied data is processed and stored on the server filesystem.
The technical implementation of this vulnerability allows attackers to write files directly to the web server's file system with attacker-controlled content, bypassing normal security boundaries that should prevent unauthorized file modifications. When user input is processed without proper validation, it creates an opportunity for malicious actors to inject harmful content into files that will later be accessed by legitimate users. This flaw operates at the core of file handling operations within the application's backend processing logic, where attacker-provided data flows directly into filesystem write operations without adequate sanitization or destination restriction checks.
The operational impact of this vulnerability extends beyond simple file creation to enable persistent cross-site scripting attacks through stored data manipulation. When attackers create malicious files such as .htm documents containing JavaScript code, they establish a foothold for executing malicious scripts against users who subsequently access these compromised files. The stored XSS vector represents a particularly dangerous consequence because it allows attackers to maintain persistence in victim environments long after the initial exploitation attempt, potentially harvesting session cookies, credentials, or other sensitive information from unsuspecting users. This vulnerability directly maps to CWE-90, which describes improper neutralization of special elements in input data that could be used for path traversal attacks.
The security implications of this vulnerability align with ATT&CK technique T1059.007, which covers scripting through web shells and stored XSS vectors. Attackers can leverage this weakness to establish long-term access to compromised systems while bypassing traditional network-based security controls that might detect direct file upload attempts. The unauthenticated nature of the attack means that any user with access to the Webbox application can exploit this vulnerability without requiring valid credentials, significantly broadening the attack surface and reducing the barriers to successful exploitation.
Mitigation strategies should focus on implementing comprehensive input validation and sanitization mechanisms that restrict file operations to legitimate use cases while preventing arbitrary file creation. Organizations should deploy strict file type validation controls that verify content and extension compatibility before allowing any file write operations. Additionally, proper access control measures must be implemented to ensure that only authorized users can perform file system modifications, combined with regular security audits to identify and remediate similar vulnerabilities in application code. The implementation of secure coding practices including parameterized queries, input sanitization, and least privilege access controls would significantly reduce the risk of exploitation for this and similar file handling vulnerabilities.