CVE-2025-14807 is a vulnerability classified under CWE-644, which involves improper neutralization of HTTP headers for scripting syntax. Specifically, IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6 fail to properly validate the HOST header in HTTP requests. This improper validation allows attackers to inject malicious content into HTTP headers, which can then be leveraged to conduct various attacks such as cross-site scripting (XSS), cache poisoning, and session hijacking. The vulnerability is remotely exploitable without requiring authentication or user interaction, increasing its risk profile. The CVSS v3.1 base score is 6.5, reflecting a medium severity level, with the vector indicating network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, and low impact on confidentiality and integrity, with no impact on availability. Although no exploits have been observed in the wild, the vulnerability poses a significant risk to organizations relying on IBM InfoSphere Information Server for data integration and management. The lack of available patches at the time of publication necessitates immediate risk mitigation strategies.

The vulnerability allows attackers to manipulate HTTP headers, potentially enabling cross-site scripting attacks that can compromise user sessions and steal sensitive information. Cache poisoning could lead to the delivery of malicious content to users, undermining trust and potentially spreading malware. Session hijacking attacks could allow unauthorized access to user accounts and sensitive data. These impacts primarily affect the confidentiality and integrity of data processed by IBM InfoSphere Information Server. Given the server’s role in enterprise data integration, exploitation could disrupt data workflows and expose critical business information. The remote, unauthenticated nature of the exploit increases the risk of widespread attacks if left unmitigated. Organizations worldwide that depend on IBM InfoSphere for data processing are at risk of data breaches, reputational damage, and compliance violations.

Organizations should immediately assess their IBM InfoSphere Information Server deployments to identify affected versions (11.7.0.0 through 11.7.1.6). In the absence of an official patch, implement strict input validation and sanitization on HTTP headers at the network perimeter using web application firewalls (WAFs) or reverse proxies to block malicious HOST header values. Monitor HTTP traffic for anomalous header patterns indicative of injection attempts. Restrict access to the InfoSphere server to trusted networks and enforce HTTPS to protect header integrity during transmission. Regularly review and update security policies related to HTTP header handling. Engage with IBM support for updates on patches or hotfixes and apply them promptly once available. Conduct security awareness training for administrators to recognize signs of exploitation and respond swiftly. Finally, implement comprehensive logging and alerting to detect and investigate suspicious activities related to HTTP header manipulation.