CVE-2025-64869 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. This vulnerability allows a low-privileged attacker to inject malicious JavaScript code into vulnerable form fields within the application. When a victim user accesses a page containing the injected script, the malicious code executes in their browser context. The attack leverages the persistent nature of stored XSS, meaning the malicious payload is saved on the server and delivered to multiple users, increasing the potential impact. The vulnerability requires the attacker to have some level of privileges to submit data to the vulnerable form fields, and user interaction is necessary for exploitation, as victims must visit the compromised pages. The CVSS 3.1 base score is 5.4, indicating a medium severity level, with the vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, meaning the attack can be launched remotely over the network with low attack complexity, requires low privileges and user interaction, causes a change in scope, and impacts confidentiality and integrity to a limited extent but does not affect availability. No public exploits are known at this time, but the vulnerability poses risks such as session hijacking, credential theft, or defacement of web content. Adobe has not yet released patches, so mitigation relies on defensive coding practices and access controls.

For European organizations using Adobe Experience Manager, this vulnerability can lead to unauthorized disclosure of sensitive information, such as session cookies or personal data, through malicious script execution in users' browsers. Integrity of web content can be compromised by altering displayed information or injecting phishing content, potentially damaging organizational reputation and user trust. Although availability is not directly affected, successful exploitation can facilitate further attacks or social engineering campaigns. Public-facing AEM deployments in sectors like government, finance, healthcare, and e-commerce are particularly at risk due to the high value of their data and users. The medium severity score reflects moderate risk, but the widespread use of AEM in Europe means the potential attack surface is significant. Attackers exploiting this vulnerability could target employees or customers, leading to data breaches or compliance violations under GDPR. The requirement for user interaction and low privileges lowers the barrier for exploitation but also limits automated mass exploitation. Organizations may face regulatory and financial consequences if the vulnerability is exploited.

1. Monitor Adobe's official channels for patches addressing CVE-2025-64869 and apply them promptly once available. 2. Implement strict input validation and output encoding on all form fields to prevent injection of malicious scripts, using context-aware encoding techniques. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4. Limit privileges for users who can submit data to vulnerable forms, enforcing the principle of least privilege. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS. 6. Educate developers and administrators on secure coding practices specific to AEM and XSS prevention. 7. Use web application firewalls (WAFs) with updated rules to detect and block XSS payloads targeting AEM. 8. Monitor logs and user activity for suspicious behavior indicative of exploitation attempts. 9. Isolate critical AEM instances and restrict administrative access via network segmentation and multi-factor authentication. 10. Prepare incident response plans to quickly address potential exploitation and limit damage.