CVE-2026-22515: 
WordPress vulnerability analysis and mitigation

CVE-2026-22515 is a Local File Inclusion (LFI) vulnerability in the AncoraThemes VegaDays WordPress theme, classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The vulnerability affects VegaDays versions up to and including 1.2.0, allowing unauthenticated remote attackers to include and execute arbitrary PHP files on the server. It was published on March 25, 2026, and assigned by Patchstack. The CVSS v3.1 base score is 8.1 (High) (Feedly).

The root cause is improper control of filename parameters used in PHP include/require statements within the VegaDays theme (CWE-98), which enables PHP Local File Inclusion despite being classified under the PHP Remote File Inclusion CWE category. An unauthenticated attacker can manipulate user-supplied input that is passed unsanitized to a PHP file inclusion function, causing the server to include arbitrary local files. The attack vector is network-based with high attack complexity, requires no privileges or user interaction, and targets WordPress installations running the vulnerable theme version (Feedly, Patchstack).

Successful exploitation allows an attacker to read sensitive files on the server (e.g., WordPress configuration files containing database credentials) and potentially execute arbitrary PHP code with web server privileges. This can lead to full compromise of the affected WordPress installation, exposure of sensitive data including credentials, and possible lateral movement within the hosting environment. Confidentiality, integrity, and availability are all rated as High impact (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 EPSS score is approximately 0.053%, indicating a low probability of exploitation in the near term. No threat actor attribution has been made, and the vulnerability does not appear in the CISA Known Exploited Vulnerabilities (KEV) catalog (Feedly).

1. Reconnaissance: Identify WordPress sites using the VegaDays theme (version ≤ 1.2.0) via web crawlers, Wappalyzer, or by inspecting page source for theme references (e.g., /wp-content/themes/vegadays/).
2. Identify vulnerable parameter: Analyze the theme's PHP files to locate parameters passed to include() or require() functions without proper sanitization or path restriction.
3. Craft malicious request: Send a crafted HTTP request to the vulnerable endpoint with a manipulated filename parameter pointing to a sensitive local file (e.g., ../../../../wp-config.php) or a previously uploaded PHP file.
4. Achieve file inclusion: The server processes the manipulated parameter and includes the specified local file, returning its contents or executing embedded PHP code.
5. Escalate access: Use exposed credentials (e.g., from wp-config.php) or execute a PHP web shell to gain persistent access and further compromise the server (Feedly).

• Network: Unusual HTTP GET or POST requests to WordPress theme files containing directory traversal sequences (e.g., ../, %2e%2e%2f) in query parameters; requests to theme PHP files with unexpected file, path, page, or template parameters.
• Logs: Web server access logs showing requests with encoded traversal patterns targeting /wp-content/themes/vegadays/ endpoints; HTTP 200 responses to requests containing wp-config or /etc/passwd in parameters.
• File System: Unexpected PHP files or web shells uploaded to the WordPress uploads directory or theme directory; modification timestamps on theme files inconsistent with legitimate updates.
• Process: Unusual child processes spawned by the web server process (e.g., bash, curl, wget) following suspicious theme file requests (Feedly).

The primary remediation is to upgrade the VegaDays theme to a version newer than 1.2.0 if a patched release is available; patch status was unconfirmed at the time of disclosure. If no patch is available or the theme is not actively needed, it should be deactivated and removed from the WordPress installation. As an interim measure, deploy a Web Application Firewall (WAF) configured to detect and block file inclusion attempts and directory traversal patterns. Monitor web server logs for suspicious file inclusion activity and restrict PHP file execution in the WordPress uploads directory (Feedly, Patchstack).