CVE-2023-27633 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Pixelgrade Customify – Intuitive Website Styling WordPress plugin, affecting versions up to and including 2.10.4. CSRF vulnerabilities allow an attacker to trick an authenticated user into submitting a forged HTTP request to a web application in which they are currently authenticated, potentially causing unintended actions without the user's consent. In this case, the vulnerability could allow a remote attacker to perform unauthorized state-changing operations on a website using the Customify plugin by exploiting the lack of proper anti-CSRF tokens or validation mechanisms. The CVSS v3.1 base score is 4.3 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and no availability impact (A:N). This means an attacker must trick a logged-in user into executing a malicious request, which could lead to unauthorized modifications affecting the integrity of the website's styling or configuration. There are no known exploits in the wild at the time of publication, and no official patches or mitigation links are provided yet. The vulnerability is categorized under CWE-352, which is a common web application security weakness related to CSRF attacks. The affected product is widely used in WordPress environments for website styling customization, making it a relevant concern for websites relying on this plugin for their front-end design and user experience.

For European organizations, the impact of this vulnerability depends largely on the extent to which they use the Pixelgrade Customify plugin on their WordPress sites. Organizations that rely on this plugin for website customization may face unauthorized changes to their website's appearance or configuration if an attacker successfully exploits the CSRF vulnerability. Although the vulnerability does not directly compromise confidentiality or availability, unauthorized integrity changes could damage brand reputation, cause user confusion, or disrupt marketing and communication efforts. In sectors such as e-commerce, media, education, and government, where website integrity is critical, even minor unauthorized changes can have significant operational and reputational consequences. Additionally, if attackers combine this vulnerability with other weaknesses, they might escalate attacks or use the compromised site as a vector for further attacks, such as phishing or malware distribution. Given the medium severity and requirement for user interaction, the risk is moderate but should not be ignored, especially for high-profile or high-traffic websites.

To mitigate this vulnerability effectively, European organizations should: 1) Immediately check if their WordPress sites use the Pixelgrade Customify plugin and identify the plugin version. 2) Monitor official Pixelgrade channels and trusted vulnerability databases for patches or updates addressing CVE-2023-27633 and apply them promptly once available. 3) Implement Web Application Firewall (WAF) rules that detect and block suspicious CSRF attempts targeting the plugin's endpoints. 4) Enforce strict Content Security Policy (CSP) headers and SameSite cookie attributes to reduce the risk of CSRF exploitation. 5) Educate site administrators and users about the risks of clicking on untrusted links while logged into administrative or user accounts on affected sites. 6) Consider temporarily disabling or replacing the plugin with alternative solutions if immediate patching is not possible. 7) Conduct regular security audits and penetration testing focusing on CSRF and other web vulnerabilities to proactively identify and remediate weaknesses. These steps go beyond generic advice by focusing on plugin-specific detection, user awareness, and layered defenses tailored to the nature of the vulnerability.