CVE-2026-27080 identifies a Local File Inclusion (LFI) vulnerability in the Mikado-Themes Deston WordPress theme, specifically due to improper control over filenames used in PHP include or require statements. This vulnerability arises when the application fails to properly validate or sanitize user-supplied input that determines which files are included during runtime. An attacker can exploit this flaw by manipulating the filename parameter to include arbitrary files from the server's filesystem. This can lead to disclosure of sensitive information such as configuration files, source code, or credentials. In some cases, LFI can be leveraged to achieve remote code execution if combined with other vulnerabilities or by including files that contain malicious code. The affected product is Deston versions up to 1.0, with no specific patch currently available. The vulnerability was reserved in February 2026 and published in March 2026. No known exploits are in the wild at this time, but the nature of LFI vulnerabilities makes them attractive targets. The absence of a CVSS score requires an assessment based on impact and exploitability factors. The vulnerability does not require authentication, increasing its risk profile. However, exploitation may require some user interaction or specific conditions depending on the deployment environment. Overall, this vulnerability represents a significant risk to websites using the Deston theme without proper mitigations.

The impact of CVE-2026-27080 is substantial for organizations using the Mikado-Themes Deston WordPress theme. Successful exploitation can lead to unauthorized disclosure of sensitive files, including configuration files containing database credentials or API keys, which can compromise the confidentiality of the system. Attackers may also gain insights into the server environment, facilitating further attacks such as privilege escalation or remote code execution. This can result in website defacement, data breaches, or full server compromise. The availability of the affected sites may be disrupted if attackers manipulate included files to cause application errors or crashes. Given WordPress's widespread use, organizations relying on this theme for their web presence are at risk of reputational damage, financial loss, and regulatory penalties if sensitive data is exposed. The lack of patches and known exploits means organizations must proactively address this vulnerability to prevent future exploitation. The risk extends to hosting providers and managed service providers supporting affected customers, potentially amplifying the impact.

To mitigate CVE-2026-27080, organizations should first verify if they are using the Mikado-Themes Deston theme version 1.0 or earlier and plan immediate remediation. Since no official patch is currently available, temporary mitigations include disabling or restricting the vulnerable include/require functionality if possible. Implement strict input validation and sanitization on any parameters controlling file inclusion to ensure only intended files can be loaded. Employ web application firewalls (WAFs) with rules designed to detect and block LFI attempts targeting known Deston theme patterns. Restrict file system permissions to limit the web server's access to sensitive directories and files, minimizing the potential damage from inclusion attacks. Monitor web server logs and application logs for suspicious requests that attempt to manipulate file inclusion parameters. Consider isolating affected sites in sandboxed environments to contain potential exploitation. Finally, maintain regular backups and prepare for rapid restoration in case of compromise. Stay alert for official patches or updates from Mikado-Themes and apply them promptly once released.