CVE-2026-22439: 
WordPress vulnerability analysis and mitigation

CVE-2026-22439 is a PHP Local File Inclusion (LFI) vulnerability in the AncoraThemes Green Planet WordPress theme, caused by improper control of filename parameters used in PHP include/require statements (CWE-98). It affects all versions of the Green Planet theme through and including version 1.1.14. The vulnerability was published on March 5, 2026, and assigned by Patchstack. It carries a CVSS v3.1 base score of 8.1 (High) (Feedly, EUVD).

The root cause is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program), where user-supplied input is passed unsanitized into PHP include or require statements within the Green Planet theme. An unauthenticated, remote attacker can manipulate filename parameters in HTTP requests to cause the server to include arbitrary local files. Exploitation requires high attack complexity but no privileges or user interaction, suggesting some environmental or conditional constraint must be met (e.g., specific server configuration or parameter exposure) (Feedly, EUVD).

Successful exploitation allows an unauthenticated attacker to read sensitive local files from the server — including configuration files, database credentials, and PHP source code — as well as potentially modify critical files and application logic, or disrupt service availability. The confidentiality, integrity, and availability impacts are all rated High. This could lead to full WordPress site compromise, credential theft, and lateral movement within the hosting environment (Feedly).

As of the time of reporting, there is no known public proof-of-concept exploit and no evidence of active in-the-wild exploitation. The vulnerability has an EPSS score of approximately 0.053%, indicating a low current probability of exploitation. It has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. The attack vector is network-accessible with no authentication required, though high attack complexity somewhat limits opportunistic exploitation (Feedly).

1. Reconnaissance: Identify WordPress sites using the AncoraThemes Green Planet theme (version ≤ 1.1.14) via tools like WPScan, Shodan, or by inspecting theme metadata in page source (/wp-content/themes/green-planet/style.css).
2. Identify vulnerable parameter: Analyze the theme's PHP files to locate include or require statements that accept user-controlled input (e.g., via GET/POST parameters or URL path segments).
3. Craft LFI payload: Construct an HTTP request that manipulates the vulnerable filename parameter to traverse directories and include a sensitive local file, e.g., ?template=../../../../etc/passwd or ?file=../wp-config.php.
4. Exfiltrate sensitive data: Review the server response for the contents of the included file, extracting database credentials, API keys, or other sensitive configuration data from files such as wp-config.php.
5. Escalate if possible: Use extracted credentials or source code knowledge to further compromise the WordPress installation, database, or hosting environment (Feedly).

• Network: Unusual HTTP GET or POST requests to WordPress theme endpoints containing directory traversal sequences (e.g., ../, ..%2F, %2e%2e%2f) in filename or template parameters.
• Logs: Web server access logs showing requests with path traversal patterns targeting theme PHP files; repeated 200 responses to requests with encoded traversal sequences.
• File System: Unexpected access to sensitive files such as wp-config.php, /etc/passwd, or /etc/shadow by the web server process.
• Process: PHP error logs showing failed include/require attempts with unusual file paths, which may indicate probing activity (Feedly).

No official patch has been confirmed as available for the Green Planet theme as of the time of reporting. Site administrators should immediately audit installations for the affected theme (versions ≤ 1.1.14) and consider switching to an alternative theme if a security update is not released by AncoraThemes. As interim mitigations: deploy Web Application Firewall (WAF) rules to detect and block path traversal and LFI attempts; restrict PHP file inclusion capabilities via php.ini (e.g., allow_url_include = Off); tighten file system permissions on the web root; and monitor application logs for suspicious file access patterns (Feedly, EUVD).

The vulnerability was noted in the Wordfence Intelligence Weekly WordPress Vulnerability Report covering the period of February 23 – March 1, 2026, indicating it received standard coverage in the WordPress security community. No significant vendor statements, high-profile researcher commentary, or broader media coverage has been identified beyond routine vulnerability disclosure channels (Wordfence Blog).