CVE-2026-25027: Unicamp Theme Local File Inclusion Flaw

CVE-2026-25027 Overview

CVE-2026-25027 is a Local File Inclusion (LFI) vulnerability affecting the ThemeMove Unicamp WordPress theme. This vulnerability stems from improper control of filename for include/require statements in PHP, allowing authenticated attackers to include arbitrary local files on the server. This type of vulnerability can lead to sensitive information disclosure, code execution, or further system compromise.

Critical Impact

Authenticated attackers can exploit this LFI vulnerability to read sensitive configuration files, access credentials, or potentially achieve remote code execution through log poisoning or other file inclusion techniques.

Affected Products

• ThemeMove Unicamp WordPress Theme versions up to and including 2.7.1
• WordPress installations using the vulnerable Unicamp theme

Discovery Timeline

• February 3, 2026 - CVE-2026-25027 published to NVD
• February 4, 2026 - Last updated in NVD database

Technical Details for CVE-2026-25027

Vulnerability Analysis

This vulnerability is classified as CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Unicamp WordPress theme fails to properly sanitize user-controlled input before using it in PHP include or require statements. This allows an authenticated attacker with network access to manipulate file paths and include arbitrary local files from the server's filesystem.

The attack requires low privileges and no user interaction, though the attack complexity is considered high. Successful exploitation can result in complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and sanitization of file path parameters within the Unicamp theme's PHP code. When the theme processes requests that involve dynamic file inclusion, it fails to properly validate that the requested file is within an expected directory or matches an allowed list of files. This allows attackers to traverse directories or specify arbitrary file paths.

Attack Vector

The vulnerability is exploitable over the network by authenticated users. An attacker can craft malicious requests containing path traversal sequences (such as ../) or direct file paths to include sensitive local files. Common targets include:

• WordPress configuration files (wp-config.php) containing database credentials
• System files like /etc/passwd for user enumeration
• Log files that may be poisoned with PHP code for remote code execution
• Other sensitive configuration files within the web application

The attacker manipulates the vulnerable parameter in requests to the Unicamp theme, causing the PHP include/require statement to load unintended files. For detailed technical information about this vulnerability, refer to the Patchstack WordPress Vulnerability Database.

Detection Methods for CVE-2026-25027

Indicators of Compromise

• Unusual requests to the Unicamp theme containing path traversal sequences (../, ..%2f, %2e%2e/)
• Access attempts to sensitive files like wp-config.php, /etc/passwd, or log files through theme endpoints
• Requests with encoded file paths or null byte injection attempts (%00)
• Unexpected file read operations in web server logs originating from theme-related URLs

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests to WordPress theme endpoints
• Monitor web server access logs for suspicious patterns including multiple ../ sequences or requests for sensitive system files
• Implement file integrity monitoring to detect unauthorized access to configuration files
• Configure intrusion detection systems to alert on LFI attack signatures

Monitoring Recommendations

• Enable detailed logging for all requests to WordPress theme directories
• Set up alerts for failed file access attempts that may indicate exploitation attempts
• Monitor authentication logs for accounts making unusual requests to theme endpoints
• Review PHP error logs for include/require failures that may indicate attack probing

How to Mitigate CVE-2026-25027

Immediate Actions Required

• Update the ThemeMove Unicamp theme to a patched version beyond 2.7.1 when available
• Implement virtual patching through a WAF to block LFI attack patterns
• Review and restrict file permissions on sensitive configuration files
• Consider temporarily disabling or replacing the vulnerable theme until a patch is released

Patch Information

As of the last update on February 4, 2026, organizations should check for updates from ThemeMove for the Unicamp theme. Monitor the Patchstack Vulnerability Database for patch availability and vendor advisories. Apply the latest theme update as soon as it becomes available.

Workarounds

• Implement server-side restrictions using open_basedir PHP directive to limit file access to the WordPress installation directory
• Deploy ModSecurity or similar WAF with OWASP Core Rule Set to block path traversal attempts
• Add custom .htaccess rules to deny requests containing suspicious path patterns
• Restrict WordPress admin and authenticated user access to trusted IP addresses only

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

# Block requests containing path traversal sequences
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
RewriteCond %{REQUEST_URI} (\.\./|\.\.\\) [NC]
RewriteRule .* - [F,L]

# Block requests attempting to access sensitive files
RewriteCond %{REQUEST_URI} (wp-config\.php|\.htaccess|\.htpasswd) [NC]
RewriteRule .* - [F,L]