CVE-2026-22515: VegaDays Path Traversal Vulnerability

CVE-2026-22515 Overview

CVE-2026-22515 is a Local File Inclusion (LFI) vulnerability affecting the VegaDays WordPress theme developed by AncoraThemes. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files on the target server. This can lead to sensitive information disclosure, configuration file exposure, and potentially remote code execution when combined with other attack techniques.

Critical Impact

Attackers can exploit this vulnerability to read sensitive server files, access WordPress configuration data including database credentials, and potentially achieve code execution through log poisoning or other LFI-to-RCE techniques.

Affected Products

• AncoraThemes VegaDays WordPress Theme version 1.2.0 and earlier
• WordPress installations running vulnerable VegaDays theme versions

Discovery Timeline

• 2026-03-25 - CVE-2026-22515 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-22515

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The VegaDays theme fails to properly validate and sanitize user-controlled input before using it in PHP file inclusion functions such as include(), include_once(), require(), or require_once().

When a PHP application dynamically constructs file paths for inclusion based on user input without adequate validation, attackers can manipulate the path to include unintended files from the local filesystem. This allows reading of sensitive configuration files, source code, and system files that the web server process has permission to access.

The network-accessible attack vector with high complexity indicates that while the vulnerability can be exploited remotely, successful exploitation may require specific conditions such as particular server configurations, knowledge of file system structure, or bypassing basic security controls.

Root Cause

The root cause of this vulnerability lies in the VegaDays theme's failure to implement proper input validation and path canonicalization for file inclusion operations. The theme accepts user-controlled parameters that are directly or indirectly used in PHP include/require statements without:

• Validating input against a whitelist of allowed files
• Sanitizing path traversal sequences (e.g., ../)
• Implementing proper path canonicalization to resolve the final file path
• Restricting file inclusion to a specific safe directory

Attack Vector

The vulnerability can be exploited remotely over the network by crafting malicious HTTP requests that manipulate parameters processed by the vulnerable theme components. Attackers typically exploit LFI vulnerabilities by:

1. Identifying the vulnerable parameter that controls file inclusion
2. Injecting path traversal sequences to navigate outside the intended directory
3. Targeting sensitive files such as /etc/passwd, wp-config.php, or application logs
4. Potentially escalating to remote code execution through techniques like log poisoning, PHP session file inclusion, or leveraging uploaded files

A typical exploitation scenario involves manipulating URL parameters or POST data to include files like ../../../../wp-config.php to extract database credentials and authentication keys. For detailed technical information, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2026-22515

Indicators of Compromise

• HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting theme files
• Unusual access patterns to the VegaDays theme directory endpoints
• Web server logs showing attempts to access sensitive system files through theme parameters
• Error logs indicating failed file inclusion attempts or permission denied messages

Detection Strategies

• Monitor web server access logs for requests containing path traversal patterns in parameters
• Implement Web Application Firewall (WAF) rules to detect and block LFI attack signatures
• Review PHP error logs for include/require failures indicating exploitation attempts
• Deploy file integrity monitoring on sensitive configuration files

Monitoring Recommendations

• Enable detailed access logging on WordPress installations running the VegaDays theme
• Configure alerting for anomalous file access patterns through web application parameters
• Monitor for unauthorized access to wp-config.php and other sensitive WordPress files
• Implement network-based intrusion detection rules for LFI attack patterns

How to Mitigate CVE-2026-22515

Immediate Actions Required

• Identify all WordPress installations using the VegaDays theme version 1.2.0 or earlier
• Disable or remove the vulnerable VegaDays theme until a patched version is available
• Implement WAF rules to block path traversal attempts targeting the theme
• Review access logs for signs of exploitation attempts

Patch Information

Organizations should monitor for security updates from AncoraThemes for the VegaDays theme. Check the Patchstack WordPress Vulnerability Report for the latest remediation guidance and patch availability information.

Until an official patch is released, consider switching to an alternative WordPress theme that is actively maintained and does not contain known vulnerabilities.

Workarounds

• Implement server-level open_basedir PHP restrictions to limit file access to the WordPress directory
• Deploy ModSecurity or similar WAF with LFI detection rules enabled
• Use WordPress security plugins that provide virtual patching capabilities
• Restrict file system permissions to prevent the web server from reading sensitive system files

# Configuration example - Apache ModSecurity LFI Protection
# Add to your Apache configuration or .htaccess

# Block common path traversal patterns
SecRule REQUEST_URI "\.\./" "id:1001,phase:1,deny,status:403,msg:'Path Traversal Attempt'"
SecRule ARGS "\.\./" "id:1002,phase:2,deny,status:403,msg:'LFI Attack Detected'"

# PHP open_basedir restriction (add to php.ini or vhost config)
# php_admin_value open_basedir "/var/www/html/wordpress:/tmp"