CVE-2025-58900 is a vulnerability classified as Improper Control of Filename for Include/Require Statement in PHP programs, specifically affecting the AncoraThemes UniTravel product up to version 1.4.2. This vulnerability allows an attacker to exploit a Remote File Inclusion (RFI) flaw by manipulating the filename parameter used in PHP include or require statements. Because the application does not properly validate or sanitize the input controlling which files are included, an attacker can supply a crafted URL or file path that causes the server to include and execute malicious code from a remote or local source. This can lead to arbitrary code execution on the server, potentially allowing full system compromise, data theft, or defacement of websites. The vulnerability is notable because it does not require authentication or user interaction, making it easier to exploit remotely. Although no known exploits have been reported in the wild yet, the vulnerability is publicly disclosed and assigned CVE-2025-58900. The lack of a CVSS score suggests the need for an independent severity assessment. The vulnerability affects a widely used PHP-based travel theme, which is often deployed on WordPress or similar CMS platforms, increasing the attack surface. The absence of patch links indicates that a fix may not yet be publicly available, emphasizing the urgency for users to apply vendor updates once released or implement temporary mitigations. The vulnerability was reserved in early September 2025 and published in December 2025, indicating recent discovery and disclosure.

For European organizations, especially those in the travel, tourism, and hospitality sectors using AncoraThemes UniTravel, this vulnerability poses a significant risk. Successful exploitation could lead to unauthorized remote code execution, allowing attackers to take control of web servers, access sensitive customer data, or disrupt services. This could result in reputational damage, regulatory penalties under GDPR due to data breaches, and operational downtime. Given the critical role of tourism in many European economies, attacks exploiting this vulnerability could have broader economic impacts. Additionally, compromised websites could be used as a pivot point for further attacks within organizational networks. The lack of authentication requirements and the potential for remote exploitation increase the threat level. Organizations with public-facing websites running vulnerable versions are particularly exposed. The absence of known exploits in the wild currently provides a window for proactive defense, but the public disclosure increases the risk of imminent exploitation attempts.

European organizations should immediately audit their web infrastructure to identify installations of AncoraThemes UniTravel version 1.4.2 or earlier. Until an official patch is released, implement strict input validation and sanitization on all parameters controlling file inclusions to prevent malicious input. Employ web application firewalls (WAFs) with rules designed to detect and block suspicious file inclusion patterns or remote URL requests. Restrict PHP configuration settings such as allow_url_include and allow_url_fopen to disable remote file inclusion capabilities. Monitor web server logs for unusual requests attempting to exploit file inclusion vulnerabilities. Isolate vulnerable systems from critical network segments to limit potential lateral movement. Once the vendor releases a patch, prioritize immediate application of updates. Additionally, conduct regular backups and ensure incident response plans are updated to handle potential exploitation scenarios. Educate development and security teams about secure coding practices to prevent similar vulnerabilities in custom themes or plugins.