Overview
A high-severity stored Cross-Site Scripting (XSS) vulnerability, identified as CVE-2025-66468, has been discovered in the Aimeos GrapesJS CMS extension. This flaw allows malicious editors to inject arbitrary JavaScript code into content pages, potentially compromising the security and integrity of websites using the affected versions. The vulnerability exists because the extension, prior to versions 2021.10.8, 2022.10.8, 2023.10.8, 2024.10.8, and 2025.10.8, lacks sufficient input sanitization when a standard Content Security Policy (CSP) is disabled. This allows attackers to persist malicious code within the CMS, affecting other users who access the compromised pages.
Technical Details
The Aimeos GrapesJS CMS extension provides a page editor that enables the creation of content pages based on extensible components. The vulnerability arises in how the extension handles user-supplied input within the page editor. Specifically, if an administrator or developer disables the Content Security Policy (CSP), the application becomes susceptible to stored XSS attacks. A malicious user with sufficient privileges (e.g., an editor role) can inject JavaScript code into a page via the editor interface. This injected code is then stored in the database and executed whenever a user views the affected page. This can lead to various malicious activities, including session hijacking, defacement of the website, or redirection of users to phishing sites.
CVSS Analysis
This vulnerability has been assigned a CVSS score of 7.6, indicating a High severity. The CVSS vector string is not provided in the prompt, but based on the nature of the vulnerability, it likely includes factors such as:
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): High (H). Requires a privileged user role.
- Privileges Required (PR): Low (L) to High (H), depending on the specific role requirements for editing content.
- User Interaction (UI): Required (R), as a user needs to access the compromised page.
- Scope (S): Changed (C), as the attacker can execute code within the context of the application.
- Confidentiality Impact (CI): High (H)
- Integrity Impact (II): High (H)
- Availability Impact (AI): High (H)
This high score reflects the potential for significant damage to the confidentiality, integrity, and availability of the affected system.
Possible Impact
The successful exploitation of CVE-2025-66468 can have severe consequences:
- Account Takeover: Attackers can steal user session cookies and hijack user accounts.
- Website Defacement: Attackers can modify the appearance and content of the website, damaging its reputation.
- Malware Distribution: Attackers can inject malicious code to distribute malware to website visitors.
- Data Theft: Attackers can access and steal sensitive data stored within the application or accessible through the user’s session.
- Phishing Attacks: Attackers can redirect users to phishing websites to steal their credentials.
Mitigation and Patch Steps
To address this vulnerability, it is crucial to upgrade your Aimeos GrapesJS CMS extension to one of the following versions or later:
- 2021.10.8
- 2022.10.8
- 2023.10.8
- 2024.10.8
- 2025.10.8
In addition to upgrading, consider the following mitigation steps:
- Enable Content Security Policy (CSP): CSP is a critical security mechanism that helps prevent XSS attacks. Ensure it is enabled and properly configured.
- Principle of Least Privilege: Grant users only the minimum necessary privileges. Avoid giving editor roles to untrusted individuals.
- Input Validation: Even with the patch, ensure that all user-supplied input is properly validated and sanitized. While the patch addresses a specific vulnerability, a comprehensive approach to input validation is always recommended.
- Regular Security Audits: Conduct regular security audits to identify and address potential vulnerabilities.
