CVE-2026-22397: 
WordPress vulnerability analysis and mitigation

CVE-2026-22397 is a PHP Local File Inclusion (LFI) vulnerability in the Mikado-Themes Fleur WordPress theme, classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). It affects all versions of the Fleur theme up to and including version 2.0. The vulnerability was published on March 5, 2026, with Patchstack credited as the assigner. It carries a CVSS v3.1 base score of 8.1 (High) (Feedly, Patchstack).

The root cause is improper validation of user-supplied input used in PHP include/require statements within the Fleur theme (CWE-98), allowing an attacker to manipulate the filename parameter to include arbitrary local files. The attack vector is network-based, requires no authentication or user interaction, but has high attack complexity, suggesting some precondition or non-trivial exploitation path must be met. An unauthenticated remote attacker can craft a malicious HTTP request that causes the PHP interpreter to include and execute arbitrary server-side files, potentially exposing sensitive configuration data or enabling code execution (Feedly).

Successful exploitation allows an unauthenticated attacker to include and execute arbitrary files on the web server, resulting in high impact to confidentiality, integrity, and availability. Attackers could read sensitive files (e.g., wp-config.php, /etc/passwd), exfiltrate credentials, execute arbitrary PHP code if writable files are accessible, and potentially achieve full system compromise. Lateral movement within the hosting environment is possible if database credentials or SSH keys are exposed through the included files (Feedly).

As of the time of reporting, there is no public proof-of-concept exploit and no evidence of active in-the-wild exploitation (Feedly). The EPSS score is approximately 0.053%, indicating a low current probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported.

1. Reconnaissance: Identify WordPress sites using the Fleur theme (version ≤ 2.0) via passive techniques such as checking theme metadata in page source (/wp-content/themes/fleur/style.css) or using tools like WPScan.
2. Identify vulnerable parameter: Locate the PHP file(s) within the Fleur theme that accept user-controlled input passed to an include or require statement — typically via a GET/POST parameter.
3. Craft LFI payload: Construct an HTTP request with a manipulated filename parameter targeting sensitive local files, e.g., ?template=../../../../wp-config.php or ?file=../../../etc/passwd.
4. Send the request: Submit the crafted request to the vulnerable endpoint on the target WordPress installation without any authentication.
5. Extract sensitive data or escalate: Parse the server response for exposed file contents (credentials, keys). If log poisoning or writable file inclusion is possible, escalate to Remote Code Execution (RCE) by injecting PHP code into an accessible log file and including it via the LFI vector (Feedly).

• Network: Unusual HTTP GET/POST requests to Fleur theme PHP files containing directory traversal sequences (e.g., ../, ..%2F, %2e%2e%2f) in parameters; requests targeting sensitive paths like wp-config.php or system files.
• Logs: WordPress or web server access logs showing repeated requests with traversal patterns to theme endpoints; HTTP 200 responses to requests with file path parameters that should not accept such input.
• File System: Unexpected access timestamps on sensitive files such as wp-config.php, /etc/passwd, or server log files; presence of newly created PHP web shells in the theme or uploads directory.
• Process: Unusual child processes spawned by the web server process (e.g., bash, curl, wget) that may indicate successful code execution following LFI escalation.

No patch has been confirmed as available for the Fleur theme beyond version 2.0 at the time of reporting (Feedly). Site administrators should immediately disable or remove the Fleur theme if a patched version is unavailable. As interim mitigations: deploy Web Application Firewall (WAF) rules to block directory traversal and file inclusion patterns in HTTP requests; restrict PHP file permissions and disable allow_url_include in php.ini; and monitor server logs for anomalous file access patterns. Check with Mikado-Themes or the WordPress theme repository for an updated version and apply it as soon as one is released (Patchstack).

Wordfence noted this vulnerability in their weekly WordPress vulnerability report covering the period of February 23 – March 1, 2026, highlighting it among other theme and plugin issues (Wordfence). VulDB also indexed the vulnerability shortly after publication. No significant broader media coverage or notable researcher commentary beyond standard vulnerability tracking has been observed.