CVE-2025-15020 Overview
CVE-2025-15020 is an Arbitrary File Read vulnerability affecting the Gotham Block Extra Light plugin for WordPress. The vulnerability exists in all versions up to and including 1.5.0 and is exploitable through the ghostban shortcode. Authenticated attackers with contributor-level access or higher can leverage this flaw to read the contents of arbitrary files on the server, potentially exposing sensitive information such as configuration files, database credentials, and other confidential data.
Critical Impact
Authenticated attackers with contributor-level privileges can read arbitrary files on the WordPress server, potentially exposing sensitive configuration data, database credentials, and private user information.
Affected Products
- Gotham Block Extra Light WordPress Plugin versions up to and including 1.5.0
Discovery Timeline
- 2026-01-14 - CVE-2025-15020 published to NVD
- 2026-01-14 - Last updated in NVD database
Technical Details for CVE-2025-15020
Vulnerability Analysis
This vulnerability is classified as CWE-22 (Path Traversal), which occurs when the application fails to properly sanitize user-supplied input before using it in file path operations. In this case, the ghostban shortcode in the Gotham Block Extra Light plugin does not adequately validate or sanitize the file path parameter, allowing attackers to traverse directories and access files outside the intended scope.
The exploitation requires the attacker to have at least contributor-level access to the WordPress site, which limits the attack surface but still presents a significant risk in environments with multiple users or where contributor accounts may be compromised.
Root Cause
The root cause of this vulnerability lies in improper input validation within the ghostban.php file, specifically around line 56 of the premium module. The shortcode handler accepts user-controlled input for file paths without implementing proper path canonicalization or restricting access to files within a designated directory. This allows directory traversal sequences (such as ../) to be used to escape the intended directory structure and access files elsewhere on the server filesystem.
Attack Vector
The attack is network-based and requires the attacker to be authenticated with at least contributor-level privileges on the vulnerable WordPress installation. The attacker can craft a malicious shortcode that includes path traversal sequences to read sensitive files from the server.
Typical targets include:
- WordPress configuration file (wp-config.php) containing database credentials
- Server configuration files (.htaccess, php.ini)
- System files on the server (/etc/passwd on Linux systems)
- Private keys or other sensitive data stored on the server
The vulnerability can be exploited by inserting a specially crafted shortcode into a post or page that includes directory traversal sequences to reference files outside the intended directory. When the page is rendered, the plugin reads and potentially displays the contents of the targeted file to the attacker.
Detection Methods for CVE-2025-15020
Indicators of Compromise
- Unusual file access attempts in server logs targeting sensitive files like wp-config.php or system files
- Posts or pages containing ghostban shortcodes with path traversal sequences (../)
- Unexpected database queries or configuration changes following contributor-level user activity
- Access logs showing repeated requests to pages containing the malicious shortcode
Detection Strategies
- Monitor WordPress audit logs for suspicious shortcode usage, particularly those containing file path parameters
- Implement file integrity monitoring on sensitive configuration files to detect unauthorized access
- Review contributor and author account activity for anomalous behavior or content creation patterns
- Deploy Web Application Firewall (WAF) rules to detect and block path traversal attempts in shortcode parameters
Monitoring Recommendations
- Enable comprehensive logging for WordPress and review logs for unusual plugin activity
- Set up alerts for file access attempts to sensitive directories outside the WordPress installation
- Monitor user activity for contributors and authors, particularly new or recently compromised accounts
- Implement real-time threat detection using SentinelOne Singularity to identify and block exploitation attempts
How to Mitigate CVE-2025-15020
Immediate Actions Required
- Update the Gotham Block Extra Light plugin to a version newer than 1.5.0 that addresses this vulnerability
- Review and audit all posts and pages for suspicious ghostban shortcode usage
- Restrict contributor and author access to trusted users only until the plugin is updated
- Consider temporarily disabling the Gotham Block Extra Light plugin if an update is not immediately available
Patch Information
The vulnerability affects all versions of the Gotham Block Extra Light plugin up to and including 1.5.0. Site administrators should monitor the WordPress Plugin Code Review and Wordfence Vulnerability Report for updates and patch information.
Workarounds
- Disable the Gotham Block Extra Light plugin until a patched version is available
- Implement server-level file access restrictions using .htaccess or web server configuration
- Add custom input validation rules via a security plugin to filter shortcode parameters containing path traversal patterns
- Reduce the number of users with contributor-level access or higher to minimize the attack surface
# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate gotham-block-extra-light
# Or rename the plugin directory to disable it manually
mv wp-content/plugins/gotham-block-extra-light wp-content/plugins/gotham-block-extra-light.disabled
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
