CVE-2025-6550 is a stored Cross-Site Scripting (XSS) vulnerability identified in the 'The Pack Elementor addon' plugin for WordPress, developed by webangon. This vulnerability affects all versions up to and including 2.1.4. The root cause is insufficient input sanitization and output escaping of the 'slider_options' parameter, which allows an authenticated attacker with Contributor-level access or higher to inject arbitrary malicious scripts into pages generated by the plugin. These scripts execute in the context of any user who views the compromised page, potentially leading to session hijacking, privilege escalation, or unauthorized actions on behalf of the victim user. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), indicating a failure to properly sanitize user-supplied input before rendering it in web pages. The CVSS v3.1 base score is 6.4 (medium severity), with an attack vector of network (remote exploitation), low attack complexity, requiring privileges (Contributor or above), no user interaction, and a scope change, meaning the vulnerability affects 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. However, the vulnerability poses a significant risk in environments where multiple users have Contributor or higher roles, as it can be leveraged to compromise other users' accounts or site integrity through malicious script execution.

For European organizations, especially those relying on WordPress websites with the Elementor page builder and the vulnerable 'The Pack Elementor addon', this vulnerability presents a moderate risk. Stored XSS can lead to theft of session cookies, enabling attackers to impersonate users, including administrators, potentially resulting in unauthorized access to sensitive data or site control. This can damage organizational reputation, lead to data breaches involving personal data protected under GDPR, and cause operational disruptions. The requirement for Contributor-level access limits exploitation to insiders or compromised accounts, but many organizations grant such privileges to multiple users, increasing risk. The scope change in the vulnerability means that the impact can extend beyond the plugin itself, potentially affecting the entire website and its users. European organizations with public-facing WordPress sites used for e-commerce, customer engagement, or internal portals are particularly at risk. The absence of known exploits in the wild suggests a window for proactive mitigation before widespread attacks occur.

1. Immediate review and restriction of user roles: Limit Contributor-level and higher privileges to trusted personnel only, and audit existing user accounts for unnecessary elevated permissions. 2. Implement strict input validation and output encoding: Until an official patch is released, apply custom filters or security plugins that sanitize the 'slider_options' parameter inputs and escape outputs to prevent script injection. 3. Monitor website content for unauthorized script injections: Use web application firewalls (WAFs) with XSS detection capabilities and regularly scan the site for malicious scripts or anomalies. 4. Keep WordPress core, themes, and plugins updated: Monitor vendor announcements for patches to 'The Pack Elementor addon' and apply updates promptly once available. 5. Employ Content Security Policy (CSP) headers: Configure CSP to restrict execution of inline scripts and loading of untrusted resources, mitigating the impact of injected scripts. 6. Educate users with elevated privileges about phishing and credential security to reduce risk of account compromise. 7. Backup website data regularly to enable quick restoration if exploitation occurs.