CVE-2025-23948: Background Animation Blocks LFI Flaw

CVE-2025-23948 Overview

CVE-2025-23948 is a Local File Inclusion (LFI) vulnerability affecting the WordPress "Background animation blocks" plugin developed by Webarea. The vulnerability stems from improper control of filename for include/require statements in PHP, classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). This flaw allows attackers to include arbitrary local files on the server, potentially leading to sensitive information disclosure, configuration file exposure, or in some cases, remote code execution when combined with other techniques.

Critical Impact

This vulnerability enables unauthenticated attackers to include arbitrary local files from the server, potentially exposing sensitive configuration data, source code, or leading to further exploitation through log poisoning or other file inclusion attack chains.

Affected Products

• WordPress Background animation blocks plugin versions up to and including 2.1.5
• WordPress installations running vulnerable versions of the background-animation-blocks plugin
• Web servers hosting affected WordPress sites with this plugin enabled

Discovery Timeline

• 2025-01-22 - CVE CVE-2025-23948 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-23948

Vulnerability Analysis

The vulnerability exists within the Background animation blocks WordPress plugin due to improper sanitization and validation of user-controlled input that is subsequently used in PHP include or require statements. When a PHP application dynamically constructs file paths for inclusion based on user input without adequate validation, attackers can manipulate these paths to include unintended files from the local file system.

In this case, the plugin fails to properly restrict the filename parameter used in file inclusion operations, allowing attackers to traverse directories and access files outside the intended scope. This can result in the disclosure of sensitive files such as /etc/passwd, WordPress configuration files (wp-config.php), or other system files containing credentials and configuration data.

The attack can be executed remotely over the network, though it requires specific conditions to be met for successful exploitation, as indicated by the high attack complexity. No user interaction or prior authentication is required to exploit this vulnerability, making it particularly dangerous for publicly accessible WordPress installations.

Root Cause

The root cause of CVE-2025-23948 is the lack of proper input validation and sanitization in the Background animation blocks plugin. The plugin accepts user-supplied input that directly influences which files are included via PHP's include() or require() functions. Without adequate validation mechanisms such as whitelisting allowed files, sanitizing directory traversal sequences (e.g., ../), or restricting file paths to specific directories, attackers can manipulate these inputs to include arbitrary files from the local filesystem.

Attack Vector

The attack is network-based, allowing remote exploitation without authentication. An attacker can craft malicious requests containing path traversal sequences or specially crafted filenames to manipulate the file inclusion mechanism. The exploitation typically involves:

1. Identifying the vulnerable endpoint in the Background animation blocks plugin
2. Crafting a request with path traversal sequences (e.g., ../../../etc/passwd)
3. Submitting the malicious request to the target WordPress installation
4. Receiving the contents of the included file in the response or leveraging the inclusion for further attacks

While the attack complexity is high (requiring specific conditions), the potential impact affects confidentiality, integrity, and availability of the system. For detailed technical information about the exploitation method, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-23948

Indicators of Compromise

• Unusual HTTP requests containing path traversal patterns such as ../, ..%2f, or ....// targeting the background-animation-blocks plugin endpoints
• Web server access logs showing requests with file path manipulation attempts targeting plugin files
• Unexpected file access or read operations on sensitive system files like /etc/passwd or wp-config.php
• Error logs indicating failed file inclusion attempts or PHP warnings related to include/require operations

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in HTTP requests
• Configure intrusion detection systems (IDS) to alert on requests containing LFI signatures targeting WordPress plugins
• Enable PHP error logging and monitor for include/require-related warnings and errors
• Deploy endpoint detection solutions like SentinelOne Singularity to identify malicious file access patterns and exploitation attempts

Monitoring Recommendations

• Regularly audit WordPress plugin installations and verify all plugins are updated to their latest secure versions
• Monitor web server logs for anomalous request patterns, particularly those targeting the background-animation-blocks plugin
• Implement file integrity monitoring (FIM) to detect unauthorized access or modifications to sensitive configuration files
• Enable SentinelOne's behavioral analysis to detect post-exploitation activities that may follow successful LFI attacks

How to Mitigate CVE-2025-23948

Immediate Actions Required

• Update the Background animation blocks plugin to a patched version if available, or deactivate and remove the plugin from affected WordPress installations
• Implement WAF rules to block path traversal attempts targeting the vulnerable plugin
• Review web server logs for evidence of exploitation attempts and conduct incident response if compromise is detected
• Consider temporarily disabling the affected plugin until a security patch is released by the vendor

Patch Information

At the time of publication, users should check for updates to the Background animation blocks plugin beyond version 2.1.5. For the latest information on available patches and security updates, refer to the Patchstack Vulnerability Report and the official WordPress plugin repository.

Workarounds

• Deactivate and remove the Background animation blocks plugin from WordPress installations until a patched version is available
• Implement server-side restrictions using .htaccess or web server configuration to block requests containing path traversal patterns
• Use a Web Application Firewall (WAF) with rules specifically designed to detect and prevent LFI attacks
• Apply the principle of least privilege to the web server process, limiting file system access to only necessary directories

# Example .htaccess rule to block common LFI patterns
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f|\.\.\\) [NC,OR]
    RewriteCond %{REQUEST_URI} (\.\./|\.\.%2f|\.\.\\) [NC]
    RewriteRule .* - [F,L]
</IfModule>