CVE-2026-12071 in TeamDavid
Summary
by MITRE • 08/07/2026
The Webbox of TeamDavid by Tobit Laboratories AG constructs redirect URLs using user-supplied input, which is appended to the redirect target in a 302 HTTP response. By using URL-encoded characters such as “%2e” (representing a dot), an attacker can manipulate the portion of the URL following the top-level domain (TLD). If a similar, registerable TLD exists (for example, if “.com” is the application’s domain, and “.company” is available for registration), an attacker can craft a URL to redirect users to a malicious “.company” domain. By using URL-encoded line feeds, it becomes possible to insert arbitrary response headers in the server's HTTP response.
This issue affects TeamDavid through Rollout 524.
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Analysis
by VulDB Data Team • 08/07/2026
The vulnerability identified in TeamDavid by Tobit Laboratories AG represents a critical server-side request forgery and open redirect flaw that leverages improper input validation in URL construction. This weakness exists within the webbox component that handles redirect functionality, where user-supplied input is directly appended to redirect targets without adequate sanitization or validation. The vulnerability stems from insufficient filtering of special characters in the redirect URL construction process, allowing attackers to manipulate the final destination of redirects through crafted input sequences.
The technical exploitation mechanism relies on URL encoding manipulation to bypass domain validation checks and create malicious redirect paths. Attackers can utilize encoded characters such as "%2e" which represents a dot character to alter the URL structure beyond the top-level domain boundary. This technique exploits the fact that when a legitimate domain like ".com" is used by the application, an attacker can construct a redirect target using a similar but registerable TLD such as ".company" to direct users to malicious domains. The vulnerability extends beyond simple domain manipulation through the use of URL-encoded line feeds which enables attackers to inject arbitrary HTTP response headers into the server's 302 redirect responses.
This flaw operates under CWE-601 Open Redirect vulnerability classification, where the application fails to validate that redirect targets are within acceptable domains or paths. The security implications align with ATT&CK technique T1566.001 Credential Access: Phishing for Credentials, as attackers can craft deceptive redirect URLs that appear legitimate to users while directing them to malicious sites designed to harvest credentials or install malware. The vulnerability affects all versions of TeamDavid through Rollout 524 and demonstrates a fundamental lack of input sanitization in the redirect mechanism.
The operational impact of this vulnerability includes potential credential theft, malware distribution, and phishing attacks where users are tricked into visiting malicious domains that appear to be legitimate extensions of the original application. The ability to inject arbitrary response headers through line feed manipulation creates additional attack vectors for header injection techniques and can potentially enable more sophisticated attack chains. Organizations using this software face significant risk of user deception campaigns and data compromise through unauthorized redirects.
Mitigation strategies should focus on implementing strict input validation and sanitization of all user-supplied redirect parameters, enforcing whitelisting of allowed domains or patterns for redirect targets, and removing the ability to inject arbitrary HTTP headers through user input. The implementation of proper URL parsing and validation libraries should be employed to ensure that only legitimate redirect destinations are permitted, with additional logging and monitoring of redirect activities to detect potential abuse attempts.
This vulnerability highlights the importance of following secure coding practices in web applications and demonstrates how seemingly simple functionality like redirects can become critical security weaknesses when proper input validation is absent. The issue underscores the need for comprehensive security testing including parameter validation, input sanitization, and HTTP header management as part of standard development lifecycle security controls.