CVE-2026-27052: Sales Countdown Timer Path Traversal Flaw

CVE-2026-27052 Overview

CVE-2026-27052 is a Local File Inclusion (LFI) vulnerability affecting the Sales Countdown Timer for WooCommerce and WordPress plugin (sctv-sales-countdown-timer) developed by VillaTheme. The vulnerability stems from improper control of filename parameters in PHP include/require statements, allowing attackers with low privileges to include arbitrary local files on the server.

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). When exploited, attackers can potentially read sensitive configuration files, access credentials stored on the server, or chain this vulnerability with other techniques to achieve remote code execution.

Critical Impact

Authenticated attackers with low-level access can exploit this Local File Inclusion vulnerability to read sensitive server files, potentially exposing database credentials, configuration data, and other confidential information that could lead to complete site compromise.

Affected Products

• Sales Countdown Timer for WooCommerce and WordPress plugin versions up to and including 1.1.8.1
• WordPress installations running the vulnerable plugin
• WooCommerce stores utilizing the affected countdown timer functionality

Discovery Timeline

• 2026-02-19 - CVE-2026-27052 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-27052

Vulnerability Analysis

This Local File Inclusion vulnerability exists due to insufficient sanitization of user-controlled input that is subsequently used in PHP include or require statements. The Sales Countdown Timer plugin fails to properly validate and sanitize file path parameters before incorporating them into file inclusion operations.

The attack requires network access and authentication with at least low-level privileges (such as a subscriber or customer account). While the attack complexity is considered high, successful exploitation could result in significant impact to confidentiality, integrity, and availability of the affected system.

In a typical WordPress/WooCommerce environment, successful exploitation could allow an attacker to:

• Read the wp-config.php file containing database credentials
• Access plugin and theme configuration files
• View server configuration files like /etc/passwd
• Potentially escalate to remote code execution by including files with attacker-controlled content (such as uploaded files or log files)

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and path canonicalization for file path parameters used in PHP include/require operations. The plugin does not adequately sanitize directory traversal sequences (such as ../) or validate that included files are within an expected directory structure.

PHP's dynamic include functionality combined with unsanitized user input creates a dangerous attack surface. Without proper validation using functions like realpath() and basename comparison, attackers can manipulate the file path to include arbitrary files from the local filesystem.

Attack Vector

The vulnerability is exploitable over the network by authenticated users with low privileges. An attacker would need to:

1. Authenticate to the WordPress site with at least subscriber-level access
2. Identify the vulnerable endpoint within the Sales Countdown Timer plugin
3. Craft a malicious request containing directory traversal sequences to target sensitive files
4. Submit the request to include arbitrary local files

While the attack complexity is rated as high, meaning specific conditions may need to be met for successful exploitation, the potential impact makes this a serious security concern for affected sites.

The exploitation mechanism involves manipulating file path parameters to traverse outside the intended directory and include sensitive system or application files. For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Advisory.

Detection Methods for CVE-2026-27052

Indicators of Compromise

• Unusual file access patterns in web server logs, particularly requests containing directory traversal sequences (../, ..%2f, %2e%2e/)
• Web application logs showing attempts to access files outside the plugin directory
• Failed or successful attempts to read system files like /etc/passwd or wp-config.php
• Anomalous authenticated user activity, especially from accounts with minimal privileges

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block Local File Inclusion patterns in HTTP requests
• Configure server-side logging to capture all file access attempts and monitor for path traversal sequences
• Deploy intrusion detection systems (IDS) with signatures for common LFI attack patterns
• Utilize WordPress security plugins that monitor file access and include operation anomalies

Monitoring Recommendations

• Enable detailed PHP error logging and monitor for file inclusion errors or warnings
• Set up alerts for HTTP requests containing encoded or plain-text directory traversal patterns
• Monitor WordPress user activity logs for suspicious behavior from low-privilege accounts
• Implement file integrity monitoring for critical WordPress files including wp-config.php

How to Mitigate CVE-2026-27052

Immediate Actions Required

• Update the Sales Countdown Timer for WooCommerce and WordPress plugin beyond version 1.1.8.1 once a patch is available
• Review WordPress user accounts and remove or disable unnecessary low-privilege accounts
• Implement Web Application Firewall rules to block Local File Inclusion attack patterns
• Audit server access logs for any signs of exploitation attempts

Patch Information

Organizations should monitor the Patchstack Vulnerability Advisory and the official VillaTheme plugin repository for security updates addressing this vulnerability. Apply the patch immediately once available.

Workarounds

• Temporarily disable the Sales Countdown Timer plugin if countdown functionality is not critical to business operations
• Restrict WordPress user registrations to prevent creation of authenticated accounts that could be used for exploitation
• Implement additional server-level access controls using .htaccess or nginx configuration to restrict file access
• Consider placing sensitive configuration files outside the web root where possible

# Example .htaccess rules to help mitigate LFI attempts
# Add to WordPress root .htaccess file

# Block common LFI patterns
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f|%2e%2e) [NC,OR]
RewriteCond %{QUERY_STRING} (etc/passwd|proc/self|wp-config) [NC]
RewriteRule .* - [F,L]

# Restrict direct access to PHP files in plugin directory
<Directory "/wp-content/plugins/sctv-sales-countdown-timer">
    <FilesMatch "\.php$">
        Require all denied
    </FilesMatch>
</Directory>