CVE-2026-22387 is a Local File Inclusion (LFI) vulnerability found in the Mikado-Themes Aviana WordPress theme, specifically affecting versions up to 2.1. The vulnerability arises from improper control of the filename parameter used in PHP include or require statements, allowing an attacker to manipulate the input to include arbitrary files from the server. This can lead to unauthorized disclosure of sensitive files, such as configuration files, password stores, or other critical data. In some cases, LFI can be leveraged to achieve remote code execution if the attacker can include files containing malicious code or upload files to the server. The vulnerability is classified as a PHP Remote File Inclusion type but is confirmed as Local File Inclusion, indicating the attacker can only include files present on the server. No CVSS score has been assigned yet, and no known exploits have been reported in the wild. The vulnerability was reserved in early January 2026 and published in March 2026. The lack of patch links suggests that a fix is either pending or not publicly available at this time. The vulnerability affects the Mikado-Themes Aviana product, a popular WordPress theme used in various websites. The root cause is insufficient validation or sanitization of user-controlled input used in file inclusion functions, a common security flaw in PHP applications. Attackers exploiting this vulnerability can gain access to sensitive information, potentially leading to further compromise of the web server or connected systems.

The impact of CVE-2026-22387 is significant for organizations using the Mikado-Themes Aviana WordPress theme, as it allows attackers to read arbitrary files on the web server. This can lead to exposure of sensitive information such as database credentials, configuration files, or user data, compromising confidentiality. In some scenarios, attackers may chain this vulnerability with other exploits to achieve remote code execution, threatening system integrity and availability. The vulnerability can facilitate website defacement, data theft, or pivoting to internal networks. Organizations hosting customer data, intellectual property, or critical services on affected systems face increased risk of data breaches and operational disruption. The absence of known exploits currently reduces immediate risk, but the public disclosure increases the likelihood of future attacks. The scope includes all websites running vulnerable versions of the Aviana theme, which may be widespread given the popularity of WordPress themes. Exploitation does not require authentication but does require the attacker to control input that influences file inclusion, making it moderately easy to exploit in vulnerable environments.

To mitigate CVE-2026-22387, organizations should immediately audit their use of the Mikado-Themes Aviana theme and identify affected versions (up to 2.1). Until an official patch is released, implement strict input validation and sanitization on any parameters controlling file inclusion to prevent manipulation. Employ whitelisting of allowed file paths and disable dynamic file inclusion where possible. Use web application firewalls (WAFs) to detect and block suspicious requests attempting to exploit file inclusion vulnerabilities. Restrict file permissions on the server to limit access to sensitive files and directories. Monitor server logs for unusual access patterns or attempts to include unexpected files. Consider isolating or sandboxing the web server environment to reduce potential damage. Once a patch or update is available from Mikado-Themes, apply it promptly. Additionally, educate developers and administrators on secure coding practices related to file inclusion and input handling to prevent similar vulnerabilities.