CVE-2025-48090 is a path traversal vulnerability identified in the CocoBasic Blanka - One Page WordPress Theme (versions prior to 1.5). The flaw arises from improper sanitization of file path inputs, specifically involving the sequence '.../...//', which bypasses normal directory traversal protections. This enables an attacker to manipulate file paths and perform PHP Local File Inclusion (LFI), allowing them to include and execute arbitrary files from the server's filesystem. The vulnerability is remotely exploitable without requiring authentication or user interaction, increasing its risk profile. Exploiting this vulnerability can lead to unauthorized disclosure of sensitive server files such as configuration files, password stores, or source code, thereby compromising confidentiality. The integrity impact is limited as the vulnerability does not directly allow modification of files, and availability is not affected. The CVSS 3.1 base score of 8.2 reflects the ease of exploitation (network vector, low attack complexity), no privileges required, and high confidentiality impact. Although no public exploits have been reported yet, the vulnerability's characteristics make it a significant threat to WordPress sites using this theme. The issue was reserved in May 2025 and published in November 2025, indicating recent discovery and disclosure. No official patches or updates are linked in the provided data, but upgrading to version 1.5 or later is implied as the fix. The vulnerability is particularly relevant for websites hosted on shared or poorly secured servers where file system access is critical.

For European organizations, this vulnerability poses a substantial risk of sensitive data exposure through unauthorized local file inclusion. Organizations running WordPress sites with the affected Blanka theme could have confidential configuration files, credentials, or personal data exposed, potentially violating GDPR and other data protection regulations. The breach of confidentiality could lead to reputational damage, regulatory fines, and further exploitation by attackers leveraging disclosed information for privilege escalation or lateral movement. The lack of required authentication and user interaction means attackers can exploit this vulnerability remotely and at scale, increasing the threat to public-facing websites. Sectors such as e-commerce, government, healthcare, and finance, which often use WordPress for public portals, are particularly vulnerable. The impact on integrity and availability is minimal, but the confidentiality breach alone is critical. Additionally, exploitation could serve as a foothold for more complex attacks, including webshell deployment or pivoting to internal networks.

1. Immediately upgrade the CocoBasic Blanka - One Page WordPress Theme to version 1.5 or later, where this vulnerability is fixed. 2. If an upgrade is not immediately possible, implement strict web server file access controls to restrict PHP from including files outside designated directories. 3. Employ a Web Application Firewall (WAF) with rules to detect and block path traversal attempts, especially those involving unusual sequences like '.../...//'. 4. Conduct thorough code reviews and input validation on any customizations or plugins interacting with file paths to ensure proper sanitization. 5. Monitor web server logs for suspicious requests containing path traversal patterns and respond promptly. 6. Use security plugins for WordPress that can detect and prevent LFI attacks. 7. Regularly back up website data and configurations to enable quick recovery in case of compromise. 8. Educate site administrators on the risks of using outdated themes and the importance of timely patching. 9. Consider isolating WordPress instances in containers or sandboxes to limit potential damage from exploitation.