CVE-2026-25458 is a PHP Local File Inclusion (LFI) vulnerability found in the Select-Themes Moments WordPress theme, affecting versions up to and including 2.2. The vulnerability arises from improper control over the filename parameter used in PHP include or require statements, which allows an attacker to manipulate the input to include arbitrary files from the server's filesystem. This can lead to unauthorized disclosure of sensitive files, execution of arbitrary PHP code, or even full server compromise if combined with other vulnerabilities or misconfigurations. The vulnerability does not have a CVSS score assigned yet, but it is classified as a Local File Inclusion issue rather than Remote File Inclusion, meaning the attacker can only include files already present on the server. Exploitation typically requires no authentication and can be triggered remotely if the vulnerable parameter is exposed via web requests. The vulnerability was published on March 25, 2026, and no known exploits have been reported in the wild. The affected product, Moments, is a WordPress theme developed by Select-Themes, commonly used in personal and small business websites. The lack of patch links suggests that a fix may not yet be publicly available or is pending release. The vulnerability is critical because it can lead to sensitive data exposure, code execution, and potential full system compromise if exploited successfully.

The impact of CVE-2026-25458 on organizations worldwide can be significant, especially for those using the Moments WordPress theme without applying patches or mitigations. Successful exploitation can lead to unauthorized access to sensitive files such as configuration files, password stores, or application source code, which can facilitate further attacks. In some cases, attackers may achieve remote code execution by including files that contain malicious code or by chaining with other vulnerabilities. This can result in website defacement, data breaches, or the website being used as a foothold for lateral movement within an organization's network. Small businesses and personal websites using this theme are particularly at risk due to limited security resources and delayed patching. Additionally, compromised websites can be leveraged for phishing, malware distribution, or launching attacks against visitors, amplifying the threat's impact. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, as attackers may develop exploits once the vulnerability details become widely known.

To mitigate CVE-2026-25458, organizations should first verify if they are using the Select-Themes Moments theme version 2.2 or earlier. Immediate steps include: 1) Applying any available patches or updates from Select-Themes as soon as they are released. 2) If patches are not yet available, temporarily disabling or replacing the Moments theme to prevent exploitation. 3) Implementing Web Application Firewall (WAF) rules to detect and block suspicious requests attempting to manipulate include/require parameters. 4) Conducting a thorough code review of the theme to identify and sanitize any user-controllable inputs used in file inclusion functions. 5) Restricting file permissions on the server to limit access to sensitive files that could be included maliciously. 6) Monitoring web server logs for unusual access patterns or attempts to exploit file inclusion vulnerabilities. 7) Educating site administrators about the risks of using outdated themes and the importance of timely updates. These targeted actions go beyond generic advice by focusing on theme-specific controls and proactive detection.