CVE-2025-46963 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier. This vulnerability arises from insufficient input sanitization 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 injected script, the malicious code executes within their browser context. This DOM-based XSS (CWE-79) can lead to unauthorized actions such as session hijacking, credential theft, or unauthorized modification of web content. The vulnerability has a CVSS 3.1 base score of 5.4, indicating a medium severity level. The attack vector is network-based (AV:N), requires low privileges (PR:L), and user interaction (UI:R) is necessary for exploitation. The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. No known public exploits or patches are currently available, and the vulnerability was published on June 10, 2025. Given the widespread use of Adobe Experience Manager in enterprise content management and digital experience platforms, this vulnerability poses a significant risk if left unmitigated.

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on Adobe Experience Manager to deliver web content and digital services. Exploitation could lead to the compromise of user sessions, leakage of sensitive information, and potential defacement or unauthorized modification of corporate websites. This can damage brand reputation, lead to regulatory non-compliance (e.g., GDPR breaches if personal data is exposed), and disrupt business operations. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to lure users to maliciously crafted pages. The medium severity score reflects a moderate risk, but the potential for chained attacks or exploitation in sensitive environments elevates the concern. European organizations in sectors such as finance, government, healthcare, and e-commerce, which often use AEM for customer-facing portals, are particularly at risk.

To mitigate this vulnerability effectively, European organizations should: 1) Immediately audit their Adobe Experience Manager installations to identify affected versions (6.5.22 and earlier). 2) Apply any available security updates or patches from Adobe as soon as they are released; if patches are not yet available, implement temporary workarounds such as disabling or restricting access to vulnerable form fields. 3) Employ robust input validation and output encoding on all user-supplied data within AEM to prevent script injection. 4) Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 5) Conduct security awareness training to reduce the risk of successful phishing attacks that could trigger exploitation. 6) Monitor web server logs and application behavior for signs of suspicious activity or attempted exploitation. 7) Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting AEM. 8) Regularly review and update incident response plans to handle potential XSS incidents promptly.