CVE-2025-48090 is a path traversal vulnerability identified in the CocoBasic Blanka - One Page WordPress Theme, affecting all versions prior to 1.5. The vulnerability arises from improper sanitization of file path inputs, specifically allowing the sequence '.../...//' to bypass normal directory traversal protections. This flaw enables an unauthenticated remote attacker to perform PHP Local File Inclusion (LFI), whereby arbitrary files on the server can be included and potentially executed or disclosed. The attack vector is network-based, requiring no privileges or user interaction, making it highly accessible to attackers. The vulnerability primarily compromises confidentiality by exposing sensitive server files such as configuration files, source code, or credentials stored on the server. Integrity impact is limited since the vulnerability does not directly allow modification of files, and availability is unaffected. Although no public exploits are currently known, the CVSS score of 8.2 reflects the high risk due to ease of exploitation and potential data leakage. The vulnerability affects WordPress sites using the Blanka theme, which is popular among small to medium businesses and creative agencies for single-page websites. The lack of an official patch link suggests that users should monitor vendor communications closely for updates. The vulnerability was reserved in May 2025 and published in November 2025, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a significant risk of sensitive data exposure, including configuration files, database credentials, and other critical information stored on web servers running the vulnerable theme. Such data leakage can lead to further compromise, including unauthorized access to backend systems or escalation of privileges. Organizations in sectors relying heavily on WordPress for public-facing websites—such as e-commerce, media, and professional services—are particularly vulnerable. The confidentiality breach can damage brand reputation, lead to regulatory non-compliance (e.g., GDPR violations due to exposure of personal data), and result in financial losses. Since the vulnerability requires no authentication and can be exploited remotely, attackers can scan and target vulnerable sites en masse. The absence of known exploits in the wild currently provides a window for proactive mitigation, but the high CVSS score and ease of exploitation suggest that exploitation attempts may emerge rapidly. The impact on integrity and availability is minimal, but the confidentiality impact alone warrants urgent remediation.

1. Monitor for and apply official patches or updates from CocoBasic as soon as they become available, upgrading the Blanka theme to version 1.5 or later. 2. In the interim, restrict file permissions on the web server to limit access to sensitive files, ensuring that the web server user has minimal read permissions outside the web root. 3. Employ a Web Application Firewall (WAF) with custom rules to detect and block path traversal patterns, specifically sequences like '.../...//' and other directory traversal attempts. 4. Conduct regular security audits and vulnerability scans on WordPress installations to identify the use of vulnerable themes and plugins. 5. Implement strict input validation and sanitization controls at the application level if customizations are made to the theme. 6. Limit exposure by isolating WordPress instances in segmented network zones and using least privilege principles for backend access. 7. Maintain comprehensive logging and monitoring to detect suspicious access patterns indicative of LFI attempts. 8. Educate site administrators about the risks of using outdated themes and encourage timely updates.