CVE-2025-64829 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. This vulnerability arises from insufficient input validation and sanitization in certain form fields within AEM, allowing a low-privileged attacker to inject malicious JavaScript code that is persistently stored on the server. When a victim user accesses the affected page containing the injected script, the malicious code executes in their browser context. This can lead to unauthorized actions such as session hijacking, theft of cookies or credentials, and manipulation of the web application interface. The vulnerability requires the attacker to have at least low-level privileges to submit malicious input and requires user interaction (visiting the compromised page) for exploitation. The CVSS 3.1 base score is 5.4, indicating medium severity, with the vector showing network attack vector, low attack complexity, privileges required, user interaction needed, and partial confidentiality and integrity impact but no availability impact. No patches or exploit code are currently publicly available, and no known exploits in the wild have been reported. However, given the widespread use of AEM in enterprise and public sector web content management, this vulnerability poses a tangible risk. Attackers could leverage this flaw to conduct targeted attacks against users of affected AEM instances, potentially leading to data leakage or further compromise. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation. Organizations using AEM should monitor Adobe advisories for patches and implement immediate mitigations such as input validation, output encoding, and Content Security Policy enforcement to reduce risk.

For European organizations, the impact of CVE-2025-64829 can be significant, especially for those relying on Adobe Experience Manager for managing public-facing websites or internal portals. Exploitation could allow attackers to execute arbitrary JavaScript in the context of users’ browsers, leading to session hijacking, theft of sensitive information such as authentication tokens or personal data, and unauthorized actions performed on behalf of users. This can undermine user trust, lead to data breaches, and potentially violate GDPR requirements concerning data protection and breach notification. The medium CVSS score reflects that while availability is not impacted, confidentiality and integrity risks exist. Organizations in sectors such as government, finance, healthcare, and critical infrastructure that use AEM are particularly at risk due to the sensitivity of their data and regulatory scrutiny. Additionally, stored XSS vulnerabilities can be leveraged as a foothold for further attacks, including phishing or malware distribution. The lack of known exploits currently reduces immediate risk but does not eliminate the threat, as attackers often develop exploits after public disclosure. Therefore, European organizations must act proactively to mitigate potential impacts.

1. Apply official Adobe patches or updates for Adobe Experience Manager as soon as they become available to address CVE-2025-64829. 2. In the absence of patches, implement strict input validation and output encoding on all form fields to prevent injection of malicious scripts. 3. Deploy and enforce a robust Content Security Policy (CSP) to restrict the execution of unauthorized scripts and reduce the impact of potential XSS payloads. 4. Limit user privileges to the minimum necessary, especially for users who can submit content to forms, to reduce the attack surface. 5. Conduct regular security audits and code reviews of custom AEM components or templates that handle user input. 6. Monitor web server and application logs for unusual input patterns or errors that may indicate attempted exploitation. 7. Educate users and administrators about the risks of XSS and encourage vigilance when interacting with web content. 8. Consider implementing web application firewalls (WAF) with rules tuned to detect and block XSS attack patterns targeting AEM. 9. Isolate critical AEM instances from less trusted networks and restrict access to administrative interfaces. 10. Maintain up-to-date backups and incident response plans to quickly recover from any successful attacks.