CVE-2025-46958 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 interface. When a victim subsequently accesses a page containing the compromised form field, the malicious script executes in their browser context. Stored XSS vulnerabilities are particularly dangerous because the injected payload persists on the server and can affect multiple users without requiring repeated exploitation. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation. The CVSS v3.1 base score is 5.4 (medium severity), with vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, indicating network attack vector, low attack complexity, requiring low privileges and user interaction, with a scope change and partial impact on confidentiality and integrity but no impact on availability. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability's exploitation could lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim, depending on the malicious script's payload and the victim's privileges within AEM or associated systems.

For European organizations using Adobe Experience Manager, this vulnerability poses a significant risk to the confidentiality and integrity of their web applications and user data. A successful exploit could allow attackers to execute arbitrary scripts in the browsers of administrators or content editors, potentially leading to theft of authentication tokens, unauthorized content manipulation, or lateral movement within the organization's network. Given that AEM is widely used by enterprises and public sector organizations across Europe for content management and digital experience delivery, exploitation could disrupt business operations, damage reputation, and lead to regulatory compliance issues under GDPR if personal data is compromised. The scope change indicated by the CVSS vector suggests that the vulnerability could affect resources beyond the initially targeted component, increasing the potential impact. Although the attack requires user interaction, targeted phishing or social engineering campaigns could facilitate exploitation. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure.

European organizations should prioritize the following mitigation steps: 1) Immediately audit all AEM instances to identify versions 6.5.22 or earlier and plan for urgent upgrades to patched versions once available. 2) Implement strict input validation and output encoding on all form fields within AEM to prevent injection of malicious scripts, using context-aware encoding libraries. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing AEM-managed content. 4) Conduct user awareness training to reduce the risk of social engineering attacks that could facilitate exploitation. 5) Monitor web application logs and user activity for unusual behavior indicative of XSS exploitation attempts. 6) Limit privileges of users who can submit content through vulnerable form fields to minimize potential damage. 7) Use web application firewalls (WAFs) with updated rules to detect and block XSS payloads targeting AEM. 8) Establish a rapid incident response plan to contain and remediate any detected exploitation. These measures, combined with timely patching, will significantly reduce the risk posed by this vulnerability.