CVE-2026-54199 in TeamDavid
Summary
by MITRE • 08/07/2026
Tobit Laboratories AG TeamDavid's Webbox is vulnerable to HTTP header injection through the request body in the application's link storing functionality (//ServerClient_celink.htm), which is appended to the redirect target in the 302 HTTP response. If a line feed is added, this will also be added to the redirect link, resulting in the ability to control the response headers. 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 represents a critical HTTP header injection flaw that exploits improper input validation within the application's link storage mechanism. This weakness specifically manifests in the //ServerClient_celink.htm component where user-supplied data from request bodies is processed and subsequently appended to redirect targets in 302 HTTP responses. The vulnerability stems from insufficient sanitization of user input, allowing malicious actors to inject arbitrary characters including line feed sequences that disrupt normal HTTP response construction.
The technical exploitation occurs when an attacker crafts a malicious request body containing line feed characters that are then incorporated into the redirect URL within the HTTP response headers. This injection enables attackers to manipulate subsequent HTTP headers, potentially leading to header-based attacks such as cache poisoning, cross-site scripting via header manipulation, or more sophisticated redirection attacks. The vulnerability is classified under CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers and aligns with ATT&CK technique T1566.002 for Phishing via Service Provider (Social Engineering).
This flaw affects TeamDavid installations running Rollout 524 and potentially earlier versions, creating a persistent security risk across all systems utilizing the Webbox's link storage functionality. The impact extends beyond simple header manipulation as it can enable attackers to redirect users to malicious destinations while bypassing normal security controls that rely on proper HTTP response construction. Organizations using this software face elevated risk of user deception attacks and potential data exfiltration through manipulated redirect behavior.
Mitigation strategies should focus on implementing strict input validation and sanitization for all user-supplied data entering the link storage system. The solution requires filtering out or encoding special characters including line feeds, carriage returns, and other HTTP header delimiter sequences before incorporating them into response headers. Organizations should also consider implementing Content Security Policy headers to limit the impact of any successful exploitation attempts. Regular security updates from Tobit Laboratories AG should be applied immediately upon availability, while network monitoring should be enhanced to detect unusual redirect patterns that may indicate exploitation attempts. The vulnerability demonstrates the importance of proper input validation in web applications and aligns with OWASP Top Ten category A03: Injection vulnerabilities, emphasizing the need for comprehensive sanitization of all external data inputs.