CVE-2025-64558 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 sanitization of user input in certain form fields, 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 malicious payload, the script executes within their browser context. This can lead to unauthorized actions such as session hijacking, credential theft, or manipulation of displayed content, compromising confidentiality and integrity. The vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity, with an attack vector of network (remote), low attack complexity, requiring privileges (low), and user interaction to trigger. The scope is changed, meaning the vulnerability can affect resources beyond the vulnerable component. No patches or known exploits are currently available, but the vulnerability is publicly disclosed as of December 10, 2025. Adobe Experience Manager is widely used by enterprises for web content management, making this vulnerability significant for organizations relying on AEM for their digital presence. The lack of availability impact reduces the risk of denial-of-service conditions, but the potential for data leakage and session compromise remains a concern.

For European organizations, the impact of CVE-2025-64558 can be significant, particularly for those using Adobe Experience Manager to manage public-facing websites or intranet portals. Exploitation could allow attackers to execute malicious scripts in the browsers of employees, customers, or partners, leading to theft of sensitive information such as authentication tokens, personal data, or business-critical information. This can result in reputational damage, regulatory penalties under GDPR for data breaches, and potential lateral movement within internal networks if session hijacking occurs. The vulnerability’s requirement for user interaction limits automated exploitation but does not eliminate risk, especially in environments with high user traffic. The medium severity rating suggests that while the vulnerability is not critical, it still poses a meaningful threat that can be leveraged as part of a broader attack chain. Organizations in sectors such as finance, government, healthcare, and e-commerce, which heavily rely on AEM for digital services, may face increased exposure.

To mitigate CVE-2025-64558, organizations should prioritize the following actions: 1) Monitor Adobe’s official channels for patches addressing this vulnerability and apply them promptly once released. 2) Implement strict input validation and output encoding on all form fields within AEM to prevent injection of malicious scripts. 3) Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4) Conduct regular security assessments and penetration testing focused on web application vulnerabilities, including XSS. 5) Educate users about the risks of interacting with suspicious content and encourage cautious behavior when browsing internal and external web pages. 6) Use web application firewalls (WAFs) with updated signatures to detect and block XSS attack patterns targeting AEM. 7) Review and minimize user privileges within AEM to reduce the attack surface for low-privileged attackers. These measures collectively reduce the likelihood and impact of exploitation.