CVE-2026-22499: Lella Theme Path Traversal Vulnerability

CVE-2026-22499 Overview

CVE-2026-22499 is a PHP Local File Inclusion (LFI) vulnerability affecting the Lella WordPress theme developed by Elated-Themes. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to manipulate file paths and include local files from the server's filesystem.

This vulnerability enables attackers to read sensitive files, potentially including configuration files containing database credentials, and in certain conditions, achieve remote code execution through log poisoning or other advanced exploitation techniques.

Critical Impact

Unauthenticated attackers can exploit this Local File Inclusion vulnerability to read sensitive server files and potentially escalate to remote code execution through advanced techniques such as log poisoning or PHP filter chains.

Affected Products

• Elated-Themes Lella WordPress Theme versions 1.2 and earlier
• WordPress installations using the Lella theme
• Web servers hosting vulnerable Lella theme deployments

Discovery Timeline

• 2026-03-25 - CVE CVE-2026-22499 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-22499

Vulnerability Analysis

This Local File Inclusion vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The vulnerability allows attackers to manipulate user-controlled input that is passed to PHP's include(), require(), include_once(), or require_once() functions without adequate sanitization.

The attack can be conducted remotely over the network, though successful exploitation requires specific conditions to be met, which contributes to the complexity of the attack. When successfully exploited, the vulnerability can compromise the confidentiality, integrity, and availability of the affected system.

Attackers exploiting this vulnerability can potentially read sensitive files such as /etc/passwd, WordPress configuration files (wp-config.php), or other critical system files. In advanced scenarios, attackers may chain this vulnerability with techniques like PHP filter chains or log poisoning to achieve code execution.

Root Cause

The root cause of this vulnerability is the failure to properly validate and sanitize user-supplied input before using it in file inclusion operations. The Lella theme does not implement adequate input filtering or path validation when processing file parameters, allowing attackers to use directory traversal sequences (such as ../) to navigate outside intended directories and include arbitrary local files.

Attack Vector

The attack is network-based and can be performed by unauthenticated users. Attackers craft malicious HTTP requests containing directory traversal sequences or specially formatted file paths in vulnerable parameters. When the theme processes these requests, it includes the attacker-specified file, exposing its contents or executing PHP code within it.

The vulnerability mechanism involves manipulating request parameters that are passed to PHP file inclusion functions. Attackers typically use path traversal techniques with sequences like ../ to navigate the filesystem hierarchy and access files outside the intended theme directory. For detailed technical information, refer to the Patchstack Lella Theme Vulnerability advisory.

Detection Methods for CVE-2026-22499

Indicators of Compromise

• HTTP requests containing directory traversal sequences such as ../, ..%2f, or ....// targeting theme files
• Access logs showing requests to Lella theme endpoints with suspicious file path parameters
• Unusual read attempts on sensitive files like /etc/passwd or wp-config.php in server logs
• Web application firewall alerts for path traversal or LFI attempts

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Monitor web server access logs for requests containing encoded or plain directory traversal sequences
• Implement file integrity monitoring on critical WordPress configuration files
• Review PHP error logs for failed file inclusion attempts indicating exploitation attempts

Monitoring Recommendations

• Enable verbose logging on WordPress installations using the Lella theme
• Configure security information and event management (SIEM) solutions to alert on LFI attack patterns
• Establish baseline file access patterns and alert on anomalous access to sensitive system files
• Monitor for outbound connections from the web server that could indicate successful post-exploitation activity

How to Mitigate CVE-2026-22499

Immediate Actions Required

• Update the Lella theme to the latest patched version as soon as one becomes available from Elated-Themes
• Consider temporarily deactivating and switching to an alternative WordPress theme if a patch is not yet available
• Implement WAF rules to block path traversal attempts targeting the Lella theme
• Audit server logs for signs of prior exploitation attempts

Patch Information

Refer to the Patchstack Lella Theme Vulnerability advisory for the latest patch status and remediation guidance from the vendor. Ensure your Lella theme installation is updated to a version beyond 1.2 once a security patch is released by Elated-Themes.

Workarounds

• Deploy a web application firewall (WAF) with rules configured to block LFI and path traversal attempts
• Implement PHP security configurations such as open_basedir to restrict file access to specific directories
• Remove or disable unused theme features that may contain the vulnerable code paths
• Use security plugins like Wordfence or Sucuri to add an additional layer of protection against LFI attacks

Implement PHP open_basedir restrictions to limit file access. This can be configured in your web server configuration or php.ini to restrict which directories PHP can access, limiting the impact of successful LFI exploitation:

# Example php.ini or .htaccess configuration
# Restrict PHP file access to WordPress directory only
php_admin_value open_basedir "/var/www/html/wordpress:/tmp"