CVE-2025-3419: Themewinter Eventin Information Disclosure

CVE-2025-3419 Overview

The Event Manager, Events Calendar, Tickets, Registrations – Eventin plugin for WordPress contains an arbitrary file read vulnerability in all versions up to and including 4.0.26. The vulnerability exists in the proxy_image() function, which fails to properly validate user-supplied input before reading file contents. This flaw allows unauthenticated attackers to read arbitrary files from the server, potentially exposing sensitive configuration files, database credentials, and other confidential information.

Critical Impact

Unauthenticated attackers can read sensitive server files including wp-config.php, database credentials, and other configuration files without any authentication required.

Affected Products

• Themewinter Eventin plugin for WordPress versions up to and including 4.0.26
• WordPress sites running vulnerable Eventin plugin versions
• Event management functionality powered by the Eventin plugin

Discovery Timeline

• 2025-05-08 - CVE-2025-3419 published to NVD
• 2025-06-04 - Last updated in NVD database

Technical Details for CVE-2025-3419

Vulnerability Analysis

This vulnerability is classified under CWE-73 (External Control of File Name or Path), which represents a category of path traversal vulnerabilities where attackers can manipulate file path parameters to access files outside intended directories. The proxy_image() function in the Eventin plugin does not adequately sanitize or validate file path inputs before processing file read operations.

The vulnerability allows network-based attacks without requiring any authentication or user interaction. Successful exploitation results in complete compromise of file confidentiality on the affected WordPress server. However, the vulnerability does not provide direct write access or ability to execute code, limiting the impact to information disclosure.

Root Cause

The root cause stems from insufficient input validation within the proxy_image() function located in core/Admin/Hooks.php. The function accepts user-controlled input that specifies file paths without properly sanitizing or restricting the paths to expected directories. This allows attackers to traverse outside the intended image directory and read arbitrary files from the filesystem.

Attack Vector

The attack can be executed remotely over the network by any unauthenticated user. Attackers craft malicious requests to the proxy_image() endpoint with path traversal sequences (such as ../) to navigate outside the intended directory structure. By manipulating the file path parameter, attackers can target sensitive files like wp-config.php, .htaccess, or other configuration files that may contain database credentials, API keys, or other sensitive information.

The exploitation requires no privileges or user interaction, making it particularly dangerous for publicly accessible WordPress installations running the vulnerable plugin version.

Detection Methods for CVE-2025-3419

Indicators of Compromise

• Unusual HTTP requests targeting the Eventin plugin proxy image endpoint with path traversal sequences (../, ..%2f, etc.)
• Web server logs showing repeated access attempts to proxy_image functionality with suspicious file path parameters
• Access attempts targeting sensitive files like wp-config.php, /etc/passwd, or other system configuration files through the plugin endpoint
• Unexpected data exfiltration patterns from the WordPress server

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests to the Eventin plugin endpoints
• Monitor web server access logs for requests containing directory traversal sequences targeting the plugin
• Deploy file integrity monitoring on sensitive WordPress configuration files to detect unauthorized read access patterns
• Utilize intrusion detection systems (IDS) with signatures for path traversal attacks

Monitoring Recommendations

• Enable detailed logging for all requests to WordPress plugin endpoints
• Set up alerts for any requests containing path traversal characters (../, encoded variants) in URL parameters
• Monitor for unusual access patterns to the core/Admin/Hooks.php file or related proxy functionality
• Implement anomaly detection for file access patterns on the WordPress server

How to Mitigate CVE-2025-3419

Immediate Actions Required

• Update the Eventin plugin to a version newer than 4.0.26 immediately
• If immediate patching is not possible, temporarily disable the Eventin plugin until the update can be applied
• Audit server logs for any evidence of exploitation attempts or successful file reads
• Rotate any credentials that may have been exposed, including database passwords and API keys stored in configuration files

Patch Information

Themewinter has released a patch addressing this vulnerability. The fix can be reviewed in the WordPress Changeset Update which modifies the Hooks.php file to properly validate and sanitize file path inputs in the proxy_image() function. WordPress administrators should update to the latest available version of the Eventin plugin through the WordPress plugin repository.

Additional technical details are available in the Wordfence Vulnerability Report.

Workarounds

• Implement WAF rules to block requests containing path traversal patterns to the Eventin plugin endpoints
• Restrict access to the WordPress admin area and plugin endpoints via IP allowlisting if possible
• Apply filesystem permissions to limit the web server user's read access to only necessary files
• Consider using a security plugin like Wordfence to provide additional protection against path traversal attacks

# Example Apache .htaccess rule to block path traversal attempts
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./) [NC,OR]
    RewriteCond %{QUERY_STRING} (\.\.%2f) [NC,OR]
    RewriteCond %{QUERY_STRING} (%2e%2e/) [NC]
    RewriteRule .* - [F,L]
</IfModule>