CVE-2025-28243 is a high-severity vulnerability identified in Alteryx Server version 2023.1.1.460. The issue is an HTML injection vulnerability classified under CWE-79, which typically refers to Cross-Site Scripting (XSS) flaws. Specifically, this vulnerability allows an attacker to inject malicious HTML content via a crafted script targeting the 'pages' component of the Alteryx Server. The vulnerability is exploitable remotely over the network (Attack Vector: Network) but requires user interaction (UI:R), and the attacker does not need any privileges (PR:N) to exploit it. The attack complexity is high (AC:H), indicating that exploitation requires specific conditions or skills. The vulnerability has a CVSS v3.1 base score of 8.0, reflecting a high impact on confidentiality and integrity, with no impact on availability. The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. Although no known exploits are reported in the wild yet, the potential for significant damage exists due to the ability to execute malicious HTML, which could lead to session hijacking, credential theft, or unauthorized actions performed on behalf of users. The lack of available patches at the time of publication increases the urgency for mitigation. Alteryx Server is a data analytics platform widely used for data preparation, blending, and analytics, often integrated into enterprise environments, making this vulnerability particularly concerning for organizations relying on it for critical data workflows.

For European organizations, the impact of this vulnerability can be substantial. Alteryx Server is used by enterprises for data analytics and business intelligence, often handling sensitive or proprietary data. Successful exploitation could lead to unauthorized disclosure of confidential information, manipulation of data analytics results, or unauthorized actions performed under the guise of legitimate users. This could undermine decision-making processes, damage organizational reputation, and lead to regulatory compliance issues, especially under GDPR requirements concerning data protection and breach notification. The high confidentiality and integrity impact means that attackers could steal sensitive data or alter analytics outputs, potentially causing financial losses or operational disruptions. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to lure users into triggering the exploit, increasing the risk of targeted attacks against European enterprises. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, as attackers may develop exploits once the vulnerability details become widely known.

Given the absence of an official patch, European organizations should implement several specific mitigations: 1) Restrict access to the Alteryx Server 'pages' component by implementing strict network segmentation and firewall rules to limit exposure to trusted users only. 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious HTML or script injection attempts targeting the vulnerable component. 3) Conduct user awareness training focused on recognizing and avoiding phishing or social engineering attempts that could trigger the vulnerability. 4) Monitor server logs and network traffic for unusual activities indicative of exploitation attempts, such as unexpected script injections or anomalous user behavior. 5) If possible, disable or restrict features related to the 'pages' component until a patch is available. 6) Engage with Alteryx support or vendor channels to obtain updates on patch availability and apply them promptly once released. 7) Implement Content Security Policy (CSP) headers to reduce the impact of injected scripts by restricting the sources from which scripts can be loaded. These targeted measures go beyond generic advice by focusing on reducing attack surface, detecting exploitation attempts, and limiting the impact of successful injections.