CVE-2024-44088 is a cross-site scripting (XSS) vulnerability identified in the Apache Geode project, specifically within its web-api (REST) interface. Apache Geode is an in-memory data grid used for real-time, consistent data management across distributed systems. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, classified under CWE-79. This flaw allows an attacker to inject malicious scripts into the web interface responses. When a logged-in user clicks a specially crafted URL containing the malicious payload, the injected script executes in the user's browser context. This can lead to theft of session cookies or tokens, enabling attackers to hijack user sessions and potentially take over accounts. The vulnerability affects all Apache Geode versions prior to 1.15.2, which has addressed the issue. Although no active exploits have been reported, the nature of XSS vulnerabilities makes them relatively easy to exploit, especially through phishing or social engineering. The lack of a CVSS score necessitates an assessment based on impact and exploitability factors. The vulnerability impacts confidentiality and integrity by exposing session data and enabling unauthorized actions. The attack requires a logged-in user and user interaction (clicking a malicious link), but no additional authentication bypass. Given Apache Geode's use in enterprise environments for critical data caching and management, exploitation could disrupt business operations and compromise sensitive data.

For European organizations, the impact of CVE-2024-44088 can be significant, particularly for those deploying Apache Geode in environments where the web-api interface is accessible to users or administrators. Successful exploitation could lead to session hijacking and unauthorized access to sensitive data or administrative functions, potentially resulting in data breaches or operational disruptions. Organizations in sectors such as finance, telecommunications, and government, which often rely on distributed caching and real-time data grids like Apache Geode, may face increased risks. The vulnerability could also facilitate lateral movement within networks if attackers gain elevated privileges. Additionally, regulatory implications under GDPR could arise if personal data is compromised due to this vulnerability. The absence of known exploits currently reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits following public disclosure. The ease of exploitation through social engineering increases the likelihood of targeted attacks against European enterprises with exposed or poorly secured Apache Geode instances.

1. Immediate upgrade to Apache Geode version 1.15.2 or later, which contains the official fix for this vulnerability. 2. Implement strict input validation and output encoding on all user-supplied data processed by the web-api to prevent script injection. 3. Restrict access to the Apache Geode web-api interface to trusted networks or VPNs to reduce exposure. 4. Employ web application firewalls (WAFs) with rules designed to detect and block XSS attack patterns targeting Apache Geode endpoints. 5. Conduct security awareness training to educate users about the risks of clicking unsolicited or suspicious links. 6. Monitor logs and network traffic for unusual activity indicative of attempted exploitation, such as repeated access to the web-api with suspicious parameters. 7. Review session management practices to ensure session tokens are securely handled and invalidated upon logout or inactivity. 8. Consider implementing Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers accessing the web-api interface. 9. Perform regular security assessments and penetration testing focused on web interfaces to detect similar vulnerabilities proactively.