CVE-2025-27380 is a cross-site scripting (XSS) vulnerability categorized under CWE-79, found in Altium Enterprise Server (AES) version 7.0.3. The vulnerability arises from improper neutralization of input during web page generation in the Project Release functionality. Specifically, an authenticated attacker can craft malicious HTML content that is injected into the Project Release pages. When other users view these pages, the injected JavaScript executes in their browsers with their privileges, potentially allowing session hijacking, credential theft, or unauthorized actions within the AES web interface. The vulnerability requires the attacker to have valid credentials (low privilege required) and some user interaction (victim must view the malicious content). The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N) indicates network attack vector, low attack complexity, privileges required, user interaction required, scope changed, high confidentiality impact, low integrity impact, and no availability impact. Although no public exploits are known, the vulnerability's nature and impact on confidentiality make it a significant risk, especially in environments where sensitive design data is managed. The vulnerability affects all platforms running AES 7.0.3, which is used for managing electronic design projects and collaboration. Given the strategic importance of intellectual property in electronics design, exploitation could lead to data leakage or further compromise of enterprise networks.

For European organizations, the impact of this vulnerability can be substantial, particularly for those in the electronics design, manufacturing, and engineering sectors that rely on Altium AES for project management and collaboration. Successful exploitation could lead to unauthorized disclosure of sensitive design data, intellectual property theft, and potential lateral movement within corporate networks. The confidentiality impact is high as attackers can steal session tokens or sensitive information via malicious scripts. Integrity impact is lower but still present, as attackers might perform limited unauthorized actions within the AES interface. Availability is not affected. The requirement for authentication and user interaction somewhat limits the attack surface but does not eliminate risk, especially in environments with many users and complex workflows. European companies with collaborative teams and remote access to AES are particularly vulnerable. The breach of sensitive design data could have downstream effects on product security, compliance with EU data protection regulations, and competitive positioning.

To mitigate this vulnerability, European organizations should prioritize upgrading Altium AES to a patched version once available. In the absence of an official patch, implement strict input validation and sanitization on all user-supplied content in the Project Release feature to prevent HTML/JavaScript injection. Restrict permissions to minimize the number of users who can create or modify Project Release content. Employ Content Security Policy (CSP) headers to reduce the impact of injected scripts. Conduct regular security awareness training to reduce the risk of users interacting with malicious content. Monitor AES logs and network traffic for unusual activity indicative of exploitation attempts. Consider isolating AES environments and enforcing multi-factor authentication to reduce the risk of credential compromise. Finally, coordinate with Altium support for any available workarounds or interim security controls.