CVE-2025-41391 is a stored cross-site scripting (XSS) vulnerability affecting multiple versions of Alfasado Inc.'s PowerCMS, specifically versions 6.7 and earlier within the 6.x series. Stored XSS vulnerabilities occur when malicious scripts are permanently stored on a target server, such as within a database, message forum, visitor log, comment field, or any other data repository. When a user accesses a compromised page or resource, the malicious script executes in their browser context. In this case, the vulnerability allows an attacker with at least low privileges (PR:L) to inject arbitrary scripts that execute when other users access the affected content. The CVSS 3.1 vector indicates the attack can be performed remotely over the network (AV:N) with low attack complexity (AC:L), but requires some level of user interaction (UI:R) and privileges (PR:L). The vulnerability impacts confidentiality and integrity (C:L/I:L) but does not affect availability (A:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. No known exploits are currently in the wild, and no official patches have been linked yet. Stored XSS in a CMS product like PowerCMS is particularly concerning because CMS platforms are widely used to manage web content and often have multiple users with varying privilege levels. An attacker exploiting this vulnerability could execute scripts in the context of other users, potentially stealing session tokens, performing actions on behalf of users, or spreading malware. The requirement for user interaction means the attack vector involves tricking users into visiting malicious or compromised pages. Given the nature of CMS platforms, this could lead to significant compromise of web applications managed by PowerCMS, including defacement, data theft, or further pivoting within the affected environment.

For European organizations using PowerCMS 6.7 or earlier, this vulnerability poses a moderate risk. The confidentiality and integrity of user sessions and data could be compromised if attackers successfully inject malicious scripts. This could lead to unauthorized access to sensitive information, session hijacking, or manipulation of content. Organizations in sectors such as government, finance, healthcare, and media that rely on PowerCMS for content management may face reputational damage, regulatory penalties under GDPR for data breaches, and operational disruptions. Since the vulnerability requires some level of user privileges and interaction, internal users or contributors with access to the CMS could be targeted to inject malicious scripts, which then affect other users including administrators. The scope change indicates that the impact could extend beyond the immediate CMS component, potentially affecting integrated systems or services. Although no exploits are currently known in the wild, the public disclosure increases the risk of exploitation attempts, especially if patches are delayed. European organizations with public-facing websites or intranet portals managed by PowerCMS should be particularly vigilant, as attackers could leverage this vulnerability to conduct phishing, spread malware, or escalate privileges within the network.

1. Immediate review and restriction of user privileges within PowerCMS to the minimum necessary, especially for users who can input content that is rendered to others. 2. Implement strict input validation and output encoding on all user-supplied content within PowerCMS to prevent injection of malicious scripts. 3. Monitor and audit CMS content for suspicious or unexpected scripts or HTML elements that could indicate exploitation attempts. 4. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the CMS-managed sites. 5. Educate CMS users about the risks of clicking on untrusted links or accessing unknown pages to reduce the risk of user interaction exploitation. 6. Stay updated with Alfasado Inc. announcements for official patches or updates addressing CVE-2025-41391 and apply them promptly once available. 7. Consider deploying web application firewalls (WAF) with rules tailored to detect and block XSS payloads targeting PowerCMS. 8. Conduct penetration testing focused on XSS vulnerabilities within PowerCMS environments to identify and remediate weaknesses proactively.