CVE-2025-64888 is a DOM-based Cross-Site Scripting vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. The vulnerability arises from improper handling of untrusted data within the Document Object Model (DOM) in the web application, allowing an attacker to inject malicious scripts that execute in the victim's browser context. This type of XSS does not rely on server-side code injection but exploits client-side script manipulation, making it harder to detect and prevent. The attacker requires low privileges and must convince the user to interact with a crafted URL or manipulated web page, such as clicking a link or loading a malicious page. Successful exploitation can lead to unauthorized actions like session hijacking, theft of cookies or credentials, and execution of arbitrary JavaScript, potentially compromising user data confidentiality and integrity. The vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity, with attack vector network, low attack complexity, low privileges required, and user interaction necessary. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component. No patches or official remediation guidance have been published at the time of disclosure, and no known exploits are reported in the wild. Organizations using AEM for web content management should prioritize assessment and mitigation to prevent exploitation.

For European organizations, the impact of CVE-2025-64888 can be significant in environments where Adobe Experience Manager is used extensively for digital content delivery, customer portals, or internal web applications. Exploitation could lead to unauthorized access to sensitive user data, session hijacking, and potential lateral movement if attackers leverage stolen credentials. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR breaches due to data leakage), and disrupt business operations by undermining user trust. Since exploitation requires user interaction, phishing or social engineering campaigns could be used to increase attack success. The medium severity rating suggests moderate risk, but the widespread use of AEM in sectors like finance, government, and retail across Europe elevates the potential impact. Additionally, the vulnerability could be leveraged as a foothold for more complex attacks targeting European enterprises relying on AEM for critical digital services.

1. Implement strict input validation and output encoding on all user-controllable inputs within Adobe Experience Manager to prevent injection of malicious scripts into the DOM. 2. Apply Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 3. Educate users and administrators to recognize and avoid interacting with suspicious URLs or links that could trigger the vulnerability. 4. Monitor web traffic and logs for unusual patterns indicative of attempted exploitation, such as unexpected URL parameters or script injections. 5. Restrict or sanitize user-generated content that could be manipulated to exploit the vulnerability, especially in public-facing portals. 6. Stay alert for official patches or security advisories from Adobe and apply updates promptly once available. 7. Employ web application firewalls (WAFs) with rules tuned to detect and block DOM-based XSS attack vectors targeting AEM. 8. Conduct regular security assessments and penetration testing focused on client-side vulnerabilities in AEM deployments.