CVE-2025-47021 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier. This vulnerability allows a low-privileged attacker to inject malicious JavaScript code into vulnerable form fields within the AEM environment. When a victim user visits a page containing the compromised form field, the malicious script executes in their browser context. The vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. The CVSS 3.1 base score is 5.4 (medium severity), with an attack vector of network (remote exploitation), low attack complexity, requiring low privileges, and user interaction (victim must visit the malicious page). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. The impact affects confidentiality and integrity but not availability. No known exploits are currently reported in the wild, and no patches have been linked yet. Stored XSS vulnerabilities are particularly dangerous because injected scripts persist on the server and can affect multiple users, potentially leading to session hijacking, credential theft, or unauthorized actions performed in the context of the victim's session. Given AEM's role as a content management system widely used by enterprises for managing digital assets and websites, exploitation could compromise sensitive corporate or customer data and damage organizational reputation.

For European organizations using Adobe Experience Manager, this vulnerability poses a risk of client-side attacks that can lead to data leakage, session hijacking, and unauthorized actions performed on behalf of users. Since AEM is often used to manage public-facing websites and internal portals, attackers could exploit this flaw to target employees, partners, or customers. The confidentiality and integrity of sensitive information processed or displayed via AEM could be compromised. Additionally, the reputational damage from a successful attack could be significant, especially for organizations in regulated sectors such as finance, healthcare, and government. The requirement for user interaction (visiting a malicious page) means social engineering or phishing could be leveraged to increase exploitation success. The medium severity score reflects the moderate impact and the need for some user action, but the low privilege requirement lowers the barrier for attackers. The vulnerability could also be leveraged as a stepping stone for more advanced attacks within the affected environment.

European organizations should prioritize the following mitigations: 1) Monitor Adobe's official security advisories closely and apply patches or updates as soon as they are released for AEM versions 6.5.22 and earlier. 2) Implement strict input validation and output encoding on all form fields within AEM to prevent injection of malicious scripts. 3) Employ 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 stored XSS. 5) Educate users and administrators about the risks of clicking on untrusted links or interacting with suspicious content hosted on AEM-managed sites. 6) Use web application firewalls (WAFs) configured to detect and block XSS attack patterns targeting AEM. 7) Review and restrict user privileges within AEM to minimize the ability of low-privileged users to inject content. 8) Implement logging and monitoring to detect anomalous activities related to form submissions and script injections. These steps, combined, reduce the likelihood and impact of exploitation beyond generic patching advice.