CVE-2025-6175 is a high-severity vulnerability classified under CWE-93, which pertains to the improper neutralization of CRLF (Carriage Return Line Feed) sequences, commonly known as CRLF Injection. This vulnerability affects DECE Software's Geodi product, specifically versions before GEODI Setup 9.0.146. The flaw allows an attacker to perform HTTP Request Splitting by injecting CRLF sequences into HTTP headers. HTTP Request Splitting occurs when an attacker manipulates input fields that are incorporated into HTTP headers without proper sanitization, enabling the injection of malicious headers or splitting a single HTTP response into multiple responses. This can lead to various attacks such as web cache poisoning, cross-site scripting (XSS), session fixation, and other HTTP header injection attacks. The CVSS v3.1 base score of 7.2 reflects a high severity, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction needed (UI:N), and a scope change (S:C). The impact affects confidentiality and integrity but not availability, indicating that attackers can potentially manipulate or intercept sensitive data or alter application behavior without causing denial of service. There are no known exploits in the wild at the time of publication, and no patch links have been provided yet, suggesting that remediation may still be pending or in progress. The vulnerability was reserved in mid-June 2025 and published in late July 2025, indicating recent discovery and disclosure. Overall, this vulnerability poses a significant risk to web applications using affected versions of Geodi, especially those exposing HTTP interfaces to untrusted inputs without proper sanitization of CRLF characters.

For European organizations using DECE Software's Geodi product, this vulnerability could have serious consequences. HTTP Request Splitting can be leveraged to conduct web cache poisoning attacks, which may result in users receiving malicious content or being redirected to phishing sites, thereby compromising confidentiality and user trust. Additionally, attackers might exploit this flaw to perform cross-site scripting (XSS) attacks, leading to session hijacking or credential theft. The integrity of web application responses can be undermined, potentially allowing attackers to manipulate application logic or data presentation. Given that no authentication or user interaction is required, attackers can exploit this vulnerability remotely and at scale. This is particularly concerning for sectors with high regulatory requirements in Europe, such as finance, healthcare, and government, where data confidentiality and integrity are paramount. The absence of a patch at the time of disclosure increases the window of exposure. Organizations relying on Geodi for critical business functions or customer-facing services may face reputational damage, regulatory penalties under GDPR for data breaches, and operational disruptions if attackers leverage this vulnerability to pivot into further attacks.

European organizations should immediately assess their deployment of DECE Software Geodi and determine if they are running affected versions prior to 9.0.146. Until an official patch is released, organizations should implement the following mitigations: 1) Employ Web Application Firewalls (WAFs) with rules specifically designed to detect and block CRLF injection attempts and suspicious HTTP header manipulations. 2) Conduct thorough input validation and sanitization on all user-supplied data that may be reflected in HTTP headers, ensuring CR and LF characters are properly encoded or removed. 3) Monitor HTTP traffic logs for anomalies indicative of HTTP Request Splitting or header injection attempts. 4) Restrict exposure of Geodi interfaces to trusted networks or VPNs where feasible to reduce attack surface. 5) Engage with DECE Software support channels to obtain timelines for patches or interim fixes and apply updates promptly once available. 6) Educate development and security teams about the risks of CRLF injection to prevent similar vulnerabilities in custom integrations or extensions. These targeted actions go beyond generic advice by focusing on immediate protective controls and proactive monitoring tailored to the nature of this vulnerability.