CVE-2025-58803 is a vulnerability classified as Improper Control of Filename for Include/Require Statement in the PHP program component of the axiomthemes Algenix product. This vulnerability allows an attacker to exploit a Local File Inclusion (LFI) flaw by manipulating the filename parameter used in PHP's include or require statements without proper validation or sanitization. The affected versions include all versions up to and including 1.0, with no specific version exclusions noted. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, making it highly accessible to attackers. The primary impact is on confidentiality, as attackers can read sensitive files on the server, such as configuration files, password files, or application source code, potentially leading to further compromise. The integrity impact is low, as the vulnerability does not inherently allow modification of files, and availability impact is none. The CVSS v3.1 base score is 8.2, reflecting a high severity due to network attack vector, low attack complexity, no privileges required, and no user interaction needed. No known public exploits have been reported yet, but the vulnerability is published and should be considered a significant risk. The root cause lies in the failure to properly control or sanitize user-supplied input used in PHP include/require statements, which is a common web application security issue. This vulnerability is particularly critical for web applications running PHP on publicly accessible servers, as it can lead to sensitive data disclosure and potential pivoting for further attacks.

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive data hosted on web servers running the affected Algenix theme. Attackers exploiting this flaw can access configuration files containing database credentials, API keys, or other sensitive information, which can lead to data breaches or unauthorized access to backend systems. The ease of exploitation without authentication increases the threat level, especially for public-facing websites. Organizations in sectors such as finance, healthcare, and government are particularly vulnerable due to the sensitive nature of their data and regulatory requirements like GDPR. The vulnerability could also be leveraged as a foothold for more advanced attacks, including privilege escalation or lateral movement within networks. The lack of known exploits in the wild currently provides a window for proactive mitigation, but the high CVSS score indicates that once exploited, the impact could be severe. Additionally, the reputational damage and potential regulatory penalties resulting from data exposure could be substantial for European entities.

To mitigate CVE-2025-58803, organizations should immediately audit their use of the Algenix theme and any custom PHP code that performs file inclusion operations. Specific steps include: 1) Apply any available patches or updates from axiomthemes as soon as they are released. 2) Implement strict input validation and sanitization on all parameters used in include or require statements, ensuring only allowed filenames or paths are accepted. 3) Employ whitelisting techniques to restrict file inclusion to a predefined set of safe files. 4) Configure PHP settings such as open_basedir to limit the directories accessible by PHP scripts, reducing the risk of arbitrary file inclusion. 5) Harden web server permissions to prevent unauthorized reading of sensitive files. 6) Monitor web server logs and intrusion detection systems for suspicious requests indicative of LFI attempts, such as unusual URL parameters or attempts to access /etc/passwd or other sensitive files. 7) Conduct regular security assessments and code reviews focusing on file inclusion and input handling. 8) Educate developers on secure coding practices related to file inclusion vulnerabilities. These targeted measures go beyond generic advice by focusing on the specific nature of this vulnerability and the affected product.